2 Stroke Outboard Bogs At Full Throttle

The water pump works fine and the water is luke warm. I have changed the fuel filters, had carbs needes replaced, new. My Mercury EFI 150 outboard starts and idles fine, but the RPM wont accelerate past idle. Hook up the timing light to the #1 plug wire. I have nothing to base this off of but to me I would think a 6 gallon gas can should last longer than 1/2 of a Day trolling, and running around. Post Sep 14, 2012 #1 2012-09-14T00:29. The reason is pretty quick and simple. I bought a second hand bay boat about a month ago. I have a 2005 Yamaha 115hp 4 stroke motor that has been sitting for 5 months. It idles normally. That said, blipping the throttle isn't going to tell you much about your mains, because you're not running primarily on the mains at that point. The fuel air mixture screws on the side of the carburettor are marked H for High for the engines high speed adjustments and the L means Low for the engines low speed adjustments. They are basically identical engines, with the 1 hp diff being I think just a carb jet. I have a 2008 4 stroke Mercury 60 bigfoot on pontoon boat. Control Outboard Throttle Yamaha. Fuel in the last couple of years now has up to 10% ethanol. When I run it in my driveway it also seems to run fine when I rev it both in neutral and in gear. (I'M NOT A. 10-10-2013, 08:25 PM. It's also the first 4-stroke to utilize an oil cooler, ensuring that all that. Mercury 75ELPT-OptiMax Outboard Motor OptiMax 1. Two stroke motors are VERY touchy in the tuning process, if they run too rich, they bog down and Two-strokes generally run lower compression. Outboard Motor bogging down - any thoughts? Got my outboard motor serviced the other day. Jul 27, 2013 #1. Mercury 40ELPT-Bigfoot Outboard Motor Four Stroke BigFoot. The engine quickly overheats. Hey Microskiffers! Just picked up a cool little Mitzi 16 w/ a 2005 50hp Yamaha 2-stroke, remote steering (center console). Have an old Mariner 2 stroke engine and its always seemed a little stiff to engage fwd/N/rev. If it idles fine but it bogs down with throttle, your high speed gas jet is probably clogged. Mercury 50ELPT-Bigfoot Outboard Motor Four Stroke Bigfoot. Hello, I have a 1994 Honda 8 hp 4 stroke. It would troll all day long but sometimes and only sometimes at increased speed it just does not want to go. suzuki outboard 20 hp engine light on at anything above idle and engine surges and won't take throttle above low speed. 3-1/4" gearcase, 13 splines. Outboard Marine Motor bogs down when giving it throttle. Motor starts fine and idles good. Hi GuysI have a problem with this outboard - it won't take full throttle. #2 · Nov 5, 2012. Product Description: 1. Johnson 90 hp outboard bogging down in water (2 of 2) - FIXED!Silly me for not tightening the fuel connection when I switched external gas tank. The engine runs fine if you will apply almost full choke, butterfly barely open. I have a 1995 125 hp two stroke and changed the stator this year. here is an overview of how two stroke motors work. I have a 1988 Evinrude 48hp SPL 2-stroke. I've changed the gas lines, tank, and fittings. But it is handy to know as a last resort if you're stuck out on the water. Seems to be starving for fuel as if the primer ball isn't firm, but the ball is firm. I have a 1995 125 hp two stroke and changed the stator this year. The main jet affects from 1/2 to full throttle. I have a 2001 Tohatsu 15hp 2 stroke. Proceeded to idle down the pearl river and went to open in up. The bike has a fresh top end rebuild, though I dont think that helps cause it has done this even before the rebuild. When you're under full throttle, the governor will not allow you to get any more power - and will result in a situation where the engine appears to bog down. When was the last time your air filter was cleaned or is your air filter sitting flush. Have a DF30A about 2 years old with about 200 hours on it. Keep in mind that a 2 stroke will never run "clean" like a 4 stroke and a good running 2 stroke will have situations. Modern outboard engines have come a long way, whether you're talking about the now-common four-stroke or modern DFI motors. Sounds like a needle problem. Mechanic said everything else checked out ok. Two stroke motors are more efficient that four strokes for a few reasons. HIDEA 2 Stroke 15hp Outboard Engine. Right now, when the engine runs at 4,500-RPM it goes for approximately 45-seconds, bogs down to 3,000-RPM, and then tries to fight its way back to a higher speed. I'm missing a third of the speed. So after checking it multiple times to make sure it was staying the same, I opened it up to full throttle and pinched the return line going from the rail to the vst. Other two-stroke engines might pump lubrication from a separate tank of two-stroke oil. after running for about 10 minutes, engine bogs down to low rpms, sometimes stalls. If they get clogged with dust and dirt, this can affect engine performance significantly by starving the engine of air. Two stroke motors are VERY touchy in the tuning process, if they run too rich, they bog down and Two-strokes generally run lower compression. 8045 Anti-ventilation plate 25 mm (1 in. The fuel air mixture screws on the side of the carburettor are marked H for High for the engines high speed adjustments and the L means Low for the engines low speed adjustments. Strong Anti-corrosion: Hard anodic oxidation treatment of the aluminum alloy surface forms a 50-80um protector, which protects the aluminum alloy surface from seawater corrosion very well, 2. Oil filter, oil chan … read more. I can still manually run up the RPM on the throttle in. The supply of this oil is controlled by the throttle position and engine speed. Idled fine prior and continued to idle fine, wouldn't die at idle RPM's. It's an oil injected 2-stroke. My '93 mercury 40hp 2 stroke oil injection outboard boggs down intermittently. I changed the plugs and then it ran well, except for one thing. Seems to be starving for fuel as if the primer ball isn't firm, but the ball is firm. The reed valve can be temperamental. Engine will also run at 5,000-RPM (WOT) fine. So after checking it multiple times to make sure it was staying the same, I opened it up to full throttle and pinched the return line going from the rail to the vst. Those are the only 3 ways to test it. Mechanic said everything else checked out ok. then you end up swapping 1/3 tank at for a blue rino that is only 2/3 full. ) below the bottom of the boat. When I try to run the boat full throttle it will bog right down after a few mintues of running. If I romp it at lower rpms, it bogs and will drop to about 20 psi, even if running only 3,000. I have a theory as to what's going on with it, but want some other opinions before moving forward. Outboard engines, the optimal speeds for cruising are between 3400 and 3800 RPM mount spark! 11, 2010 is clogged and fuel is n't reaching the engine & # x27 ; get! Over 70KM per hour at 5200-5300 RPM, etc. When i went to buy it, the seller ran the motor for me for a bit to ensure it worked. may affect the consumption figures. Outboard problem I have a 2008 90hp Mercury 2 stroke outboard on a 17 foot fishing boat at mid to full throttle the boat wants to go to the right. We mainly see this issue on two stroke outboards. comes back to higher revs briefly when we pump the bulb. The fuel air mixture screws on the side of the carburettor are marked H for High for the engines high speed adjustments and the L means Low for the engines low speed adjustments. The repair manual doesn't help either. posted 11-05-2007 04:56 PM ET (US) I have neglected my poor Montauk, I let it sit too long and it was not properly winterized. Fished a hour or so and started motor ran fine purred like a kitten. Posted March 2, 2014. For while it would bog a little and then pick up an run normal. Mercury 40ELPT-Bigfoot Outboard Motor Four Stroke BigFoot. It will get back to full speed but doesn't have the pep like when it first starts. It begins to sputter until I either ease off the throttle or it shits off. Now it will run fine until I get over 3/4 throttle, maybe even a little closer to full throttle, then it will bog down, power drops off. 01-27-2007, 05:56 PM. #2 · Nov 5, 2012. Motor starts find idles but when I try to give it throttle the motor will bog down and almost stall unless I play with the choke to keep it running. I recommend cleaning your carby the old fashioned. Brand: Yamaha. Engine has been flawless. If you run the engine between 4,000 and 4,500 RPM the engine RPM will start to drop and rise by itself. replaced primer bulb, external water separator filter, and checked fuel lines for cracks. FourStroke carbureted outboards, and the 25/30 hp. Find the full specs for the Evinrude E-TEC. Idles and runs great with no load but as soon as we put her in the water she bogs down and loads up at just past 3/4. Ater it runs at full throttle for a few minutes, the RPMs … 2005 mercury 200 optimax My motor idles and runs fine at mid to low rpms but at high rpm it starts starts sputtering. Mercury 50hp 2-stroke outboard is overheating. I have a 2008 4 stroke Mercury 60 bigfoot on pontoon boat. New hose for $40 and problem solved!. Search: 2 stroke loses power at full throttle. Suzuki DF30A bogging down. It's frustrating to launch your boat and realize the motor won't start. Most manuals come with a. An engine cover design features a large air induction port to provide maximum airflow and thus, maximum power. My 2 stroke fires right up and runs great for about 1/2 mile, then once warmed up it bogs down during acceleration. I got a 2003 Yamaha 50 on a 16ft seaark. Suzuki Dt75 Dt85 2 Stroke Outboard Engine Full Service Repair Manual 1981 1992. But, usually the engine bogs down when they are clogged. For a limited time, every Yamaha part is up to an additional 20% off! Yamaha 2 stroke outboard bogging Jun 06, 2020 · A relative of mine has a 2004 50 HP 4-stroke Yamaha he bought new and it has always ran great until now. 2008 merc 30 hp 2 stroke (nissan marine). on 5/29/13 at 10:26 am. On the hose I can run it up to full RPM, but in the water (under a load) it will " bog down". The engine quickly overheats. Also it seems to be using a lot of gas in my opinion. on 5/29/13 at 10:26 am. It has 35-36 psi (gauge was jumping slightly) at idle and when you give it throttle. Outboard Marine Motor bogs down when giving it throttle. Started back up would only go real slow real rough, then after a couple minutes got back up to speed but would bogged down going fast and. 1, with the boat in the water at full speed 2, with the outboard in a test tank with a test propeller on it, running at max rpm. Mixture Screws. we have a 13 year old yamaha 175. I've sealed all the possible air leaks, adjusted the cable every way I can think of,screwed the idle screw all ways possible,tried different gas oil ratios, and even ran it without the air cleaner, but still if I twist the throttle full it bogs down. •Main jet (adjustable with optional jet sizes) * Controls fuel flow primarily 1/2 through to full throttle. Increased fuel economy and outstanding overall performance. Thinking it was a fuel supply issue, I gently squeezed the primer bulb (which was firm) in the fuel line, no change. I have a 2005 Yamaha 115hp 4 stroke motor that has been sitting for 5 months. Suzuki Dt75 Dt85 2 Stroke Outboard Engine Full Service Repair Manual 1981 1992. Give it the full throttle and she'd bog down because it was crushing the inner membrane. But it is handy to know as a last resort if you're stuck out on the water. If I keep the throttle backed off a little from full it will run fine but I would like to get as much speed as I can out of her. Has a major affect on jetting. HIDEA 2 Stroke 15hp Outboard Engine. Search: 2 stroke loses power at full throttle. I tach out at around 4200 rpm and about 12mph. We promote a broad selection of Boat Outboard, plus listings such as Outboard Engine, Cover, Anchor, Seat, and lots extra. When I try to run the boat full throttle it will bog right down after a few mintues of running. •Main jet (adjustable with optional jet sizes) * Controls fuel flow primarily 1/2 through to full throttle. Long story short, it ran flawlessly for 2 straight days at all throttle levels then I went out last night and as soon as I got past 1/2 throttle, about to get on plane it would bog up and down. A small engine like that that idles ok but bogs under acceleration is usually one of three things; 1) air leak at the intake boot. Looking for input?. as I move lever forward, fuel pressure starts to drop and it starts to bog. Jul 27, 2013 #1. * Controls fuel flow from 1/4 to full throttle. It started doing this late last summer and I looked at it for a couple weekends and then gave up. Have a DF30A about 2 years old with about 200 hours on it. The reason is pretty quick and simple. It runs fine i low rpm and in idle as you can see in the video. It has new fuel pump and new filters. 2 stroke outboard bogs at full throttle. The technology is referred to as auto-lube. I have a 1982 mercury 80 hp outboard motor. If you have 4-Stroke outboards or fuel injected motors, then this will be a common issue caused by an air leak. Idled fine prior and continued to idle fine, wouldn't die at idle RPM's. I'm guessing on the year of the boat, but the tag on the motor says 1999. With the exceptions of Mercury Optimax's, Yamaha OX-66, HPDI's, and Evinrude FICHT and E-TEC's, most two strokes are not computerized. This is due to a slightly lean mixture due to dirty jets, incorrect mixture adjustment or low fuel level on the float chamber, in turn due to flow restriction or faulty pump. This mainly happens when the engine is cold but can happen. The reason for this is it being a 2-stroke engine. My next step is to grab an inline spark tester and check for spark to try and Eliminate as many issues as I can. It will run at that rate for as long as I need to. Legacy -The 2021 Season-Legacy Started September 11. Boat/motor doesn't want to "pop" on the hole shot and plan out like usual. 16 posts Jun 23, 2011 1984 Johnson 70 idles but won't. Mine starts no problem but when going full throttle it will die sometimes or takes forever to get going but it never gets top speed. Love the boat, but having some strange issues w the Yamaha that I figure some of you may be able to offer some suggestions on. If I romp it at lower rpms, it bogs and will drop to about 20 psi, even if running only 3,000. Hook up the timing light to the #1 plug wire. If they get clogged with dust and dirt, this can affect engine performance significantly by starving the engine of air. Two stroke motors are VERY touchy in the tuning process, if they run too rich, they bog down and Two-strokes generally run lower compression. Engine runs smooth, and doesn't smoke, just will not turn up to rpm. by PSG-1 » 21 Mar 2012, 20:37. Hmm interesting I'll check it I just replaced it about a month ago. Carb has been cleaned, new plugs, fuel filter good, rectifier charges, good gas oil good. If it revs you have a vacuum leak. I need some help diagnosing my boats problem. This is one of those annoying, occasional issues that seem to be hard to pin down, so here's my attempt to describe what has happened and the circumstances in the hope that someone here will be able to offer some advice on how to resolve the issue. Strong low-end torque characteristics allow many jobs to be performed at partial throttle, increasing fuel efficiency. 1990 Mercury 25hp Bogging down at full throttle and pulsating. Aug 2, 2009. after running for about 10 minutes, engine bogs down to low rpms, sometimes stalls. Enhanced fuel injection (EFI models) for boosted efficiency. Basically, she'll start up fine and idle around 1500-2000 rpm (full choke) but upon going to 1/2 choke or giving her any throttle, she dies. SKUYM04008. 2 stroke outboard loses power at full throttle Yamaha 90 outboard 2 stroke - dt-fotografie. By contrast, an engine that is rich will tend to bog. For while it would bog a little and then pick up an run normal. 2008 Nautic Star 18 ft with a 90 Merc Optimax. It begins to sputter until I either ease off the throttle or it shits off. So the issue at the moment is that it won't rev up over 2000 rpm while under load. Boat surging/bogging down - Optimax Posted. Search: 20 hp mercury outboard 2 stroke specs. Fasten the outboard with the provided mounting hardware. Here are 10 reasons and fixes to help prevent lack of fuel to a 2-stroke engine. Search: 20 hp mercury outboard 2 stroke specs. This issue is still common even on these engines though. by Lee4heisman. Other times the engine has no problems getting on plane. I tach out at around 4200 rpm and about 12mph. 83SanDimas. as I move lever forward, fuel pressure starts to drop and it starts to bog. The boat has had very little use, but I believe it was stored outdoors for several seasons. Idles and runs great with no load but as soon as we put her in the water she bogs down and loads up at just past 3/4. No matter how much throttle I give it, it doesn't go above 3500 - 3600 rpms. New hose for $40 and problem solved!. Member since Sep 2009. About stroke 2 power at loses throttle full. 1 boat purchase at auction runs ok but bogs at 3krpm. The motor ran great and I ran full throttle for about 15 minutes from the launch to my slip. F115 Bogging down - iboats Boating Forums Pretty common with EFI outboards. 4-Stroke engines or fuel-injected engines will generally never lose prime. 2001 Mercury 60 HP 3 Cylinder 2 Stroke 20" Outboard Motor 2 Marine Outboard In line Fuel Filter 879885Q 1999-2004 Mercury 60 hp BigFoot 2S decal set 37-826325A01. The outboard motor weighs 189 lbs. Fuel pressure holds solid at 40psi at 4,000, runs smooth. Suzuki Dt75 Dt85 2 Stroke Outboard Engine Full Service Repair Manual 1981 1992. If the butterfly is fully open then engine bogs down when given throttle. Legacy -The 2021 Season-Legacy Started September 11. 1, with the boat in the water at full speed 2, with the outboard in a test tank with a test propeller on it, running at max rpm. The boat has not been used for at least 2 seasons, and according to the past owner, has probably only had about 60 gal of fuel run through it for its whole life. Outboard problem I have a 2008 90hp Mercury 2 stroke outboard on a 17 foot fishing boat at mid to full throttle the boat wants to go to the right. Control Outboard Throttle Yamaha. Smaller/older model outboard engines are usually not fitted with an intake air filter of any sort, but plenty of newer four- and two-stroke outboard engines have them. Motor starts fine and idles good. 4KW / 6HP, type: 2-stroke Superior engine water cooling system for better engine performance. I have a 1988 Evinrude 48hp SPL 2-stroke. Happened to me once where it wasnt sitting right and would cause my bike to bog when opening up throttle. This issue is still common even on these engines though. After reading this thread, I pulled the plugs last night and both were oily and wet. A serious student of the Honda outboard, Jacoby knew exactly what I was talking about when I mentioned a bogging BF90, and had some advice for BF90 owners: Get the revs up: "The BF90 needs to be propped to run 6000 rpm at wide-open throttle, and that's with a full load of fuel, gear and passengers," said Jacoby. Love the boat, but having some strange issues w the Yamaha that I figure some of you may be able to offer some suggestions on. Link to comment. Member since Sep 2009. The engine quickly overheats. More taper means progressively more fuel, or richer at full throttle. Continue this until water is no longer being expelled from the jet ski. It it hard to start after shutting off and cranks similar to trying to crank it with the kill switch off. Do I recommend doing this? Nope. Fuel pressure holds solid at 40psi at 4,000, runs smooth. Put in neutral and reved it up. It mixes the right amount of fuel and air for combustion, with the mix being sucked into the engine by a vacuum. I bought a 2000 15' Key West with a 50Hp (2 stroke) carburated Mercury engine this spring, and I have still not had a successful trip on it yet due to the engine. Mercury 40ELPT-Bigfoot Outboard Motor Four Stroke BigFoot. I have a 2000 90 hp mercury 2 stroke and when going on plane sometimes the engine bogs down and is very slow to get on plane. Mechanic said everything else checked out ok. 3 L - 200 cid. Add To Cart. I changed the fuel filter but the problem persists. dedt-fotografie. When you're under full throttle, the governor will not allow you to get any more power - and will result in a situation where the engine appears to bog down. Seems to be starving for fuel as if the primer ball isn't firm, but the ball is firm. Motor bogs down at full throttle Recent Topics. Post Sep 14, 2012 #1 2012-09-14T00:29. The motor (2003 Yamaha 115 2 stroke) starts and idles, no problem. It has been running great the past few weeks. Posted June 23, 2008. The first thing to check before anything else is the mixture screws. If they get clogged with dust and dirt, this can affect engine performance significantly by starving the engine of air. In both cases, reliability is far better than it was in decades past, fuel efficiency has increased, and problems like smoky exhaust and ear-splitting sound levels are ancient history. If no start go to step #3. 4 I receive boat install carbs same thing. The Mercury 25 HP EFI outboard motor 25MH model is a manual start outboard with 15-inch short shaft, manual start and manual tilt. A small engine like that that idles ok but bogs under acceleration is usually one of three things; 1) air leak at the intake boot. Outboard Motor bogging down - any thoughts? Got my outboard motor serviced the other day. Most manuals come with a. Condition is used, but boat, engine and trailer are in absolutely fantastic condition for their age. The last couple of trips my 1999 Merc 25 two stroke has been acting a little strange. 2 stroke loses power at full throttle Sep 28, 2021 · 10. Yamaha 115 four stroke bogging down. Easily remove the engine cover with a button lock for instant engine access Through the exhaust outlet of the propeller to. The repair manual doesn't help either. Last year at the end of the season the boat started running bad after running it for about 30 min. Increased fuel economy and outstanding overall performance. So he replaced the reed valves and that fixed the problem. At half throttle either engine will push the boat at 5. We mainly see this issue on two stroke outboards. Zhejiang, China. Re: Mercury 9. When I would cruise at 2/3 throttle or less, no problem. Outboard motor designs vary depending on make and model, but all operate on similar principles. So here's the deal…. F115 Bogging down - iboats Boating Forums Pretty common with EFI outboards. 2 stroke outboard loses power at full throttle. I finally made it a priority and took it out today. 83SanDimas. After sitting for an hour I cranked up to leave. I have been working on an old jon boat for a while now. This ethanol attracts moisture (water) and debris which reduces fuel quality and may cause the engine to run rough (or not at all). •Main jet (adjustable with optional jet sizes) * Controls fuel flow primarily 1/2 through to full throttle. 1 is the displacement, they generally have smaller combustion chambers, which means less fuel burned. If they get clogged with dust and dirt, this can affect engine performance significantly by starving the engine of air. replaced primer bulb, external water separator filter, and checked fuel lines for cracks. When I would cruise at 2/3 throttle or less, no problem. Looking for input?. It it hard to start after shutting off and cranks similar to trying to crank it with the kill switch off. My '93 mercury 40hp 2 stroke oil injection outboard boggs down intermittently. posted 07-07-2013 10:19 PM ET (US) I launched my 2005 Montauk 170 with 90 Mercury yesterday. 2-stroke bogging. The main jet affects from 1/2 to full throttle. My owners manual says I can run this motor full at 5400 rpm max. Less taper means there is less of an increase in fuel flow, or leaner at full throttle. At full throttle, it bogs down. Turned out, the inner lining of the gas line-Mercs best-has a separate membrane. Has a major affect on jetting. I tach out at around 4200 rpm and about 12mph. somewhere in the center leaves a golden brown residue on the plug. Access Free Mercury 60 Hp Bigfoot 2 Stroke Manual Mercury 60 Hp Bigfoot 2 Stroke Manual This is likewise one of the factors by obtaining the soft documents of this mercury 60 hp bigfoot 2 stroke manual by online. With the bike fully warmed up, find a long straight, and install a fresh plug. You should start to hear it pop, just keep pulling or kicking and holding it wide open until it starts, then rev the engine a bit to clean it out and keep it running, then warm it up properly. I have a manual tiller 40hp (EX40) 2 stroke outboard motor engine having issue with engine cannot rev up. Seems to be starving for fuel as if the primer ball isn't firm, but the ball is firm. Add To Cart. Outboard problem I have a 2008 90hp Mercury 2 stroke outboard on a 17 foot fishing boat at mid to full throttle the boat wants to go to the right. Hello, I have a 1994 Honda 8 hp 4 stroke. I've changed the gas lines, tank, and fittings. Got a new water pump, LU oil and spark plugs. With the exceptions of Mercury Optimax's, Yamaha OX-66, HPDI's, and Evinrude FICHT and E-TEC's, most two strokes are not computerized. Did you check to see if the needle is the stock needle or. Then I would have issues re-starting the motor all together. If they get clogged with dust and dirt, this can affect engine performance significantly by starving the engine of air. Throttle Full Bogs Jet Yamaha Down Ski. Solution: Trace the source. Since you say it is viewable, I'd suggest it's not uncommon to see it glow orange at high throttle. 2 stroke outboard loses power at full throttle. Mixture Screws. A carburetor is an important component of the correct functioning of your boat's gas engine, whether inboard or outboard. You should start to hear it pop, just keep pulling or kicking and holding it wide open until it starts, then rev the engine a bit to clean it out and keep it running, then warm it up properly. Clean the air filter and warm the bike up. The reason for this is it being a 2-stroke engine. Mercury Outboard drawing with Water Pump Parts - Drive Shaft, seal kit, impeller for 50-60hp 3 cylinder 2 stroke and 40-60 hp. Most 2-strokes are not very efficient and will burn part of the air/fuel mixture as it's leaving the exhaust port. 2 stroke outboard loses power at full throttle Yamaha 90 outboard 2 stroke - dt-fotografie. It begins to sputter until I either ease off the throttle or it shits off. Start with no-worry reliability. Modern outboard engines have come a long way, whether you're talking about the now-common four-stroke or modern DFI motors. it's new, but very hard to start. I have nothing to base this off of but to me I would think a 6 gallon gas can should last longer than 1/2 of a Day trolling, and running around. Started back up would only go real slow real rough, then after a couple minutes got back up to speed but would bogged down going fast and. Test drive t. I changed the fuel filter but the problem persists. Sounds like a needle problem. Keep in mind that a 2 stroke will never run "clean" like a 4 stroke and a good running 2 stroke will have situations. The Mercury 25 HP EFI outboard motor 25MH model is a manual start outboard with 15-inch short shaft, manual start and manual tilt. 4 I receive boat install carbs same thing. I'm trying to dial in the carb settings. Posted March 11, 2009. Follow Mercury 115 4 Stroke surging. Fuel in the last couple of years now has up to 10% ethanol. OEM Part Number Mercury: 8M0113801 / 43024A09. 2 stroke loses power at full throttle Sep 28, 2021 · 10. He rebuilt the carbs and still could not get it to rev past 1500RPM under a load. 4-Stroke engines or fuel-injected engines will generally never lose prime. If it idles fine but it bogs down with throttle, your high speed gas jet is probably clogged. About stroke power loses throttle at 2 full. Changed fuel lines, primer ball, fuelwater separator still same issue. Control Outboard Throttle Yamaha. Dealer says it sounds like a plugged fuel filter. I've changed the gas lines, tank, and fittings. Start with no-worry reliability. Fuel issue?. Here are 10 reasons and fixes to help prevent lack of fuel to a 2-stroke engine. Search: 2 stroke loses power at full throttle. line the inner side of Verado®! Full hp it needs to be serviced to give the engine 's cooling completely. Looking for input?. Right now, when the engine runs at 4,500-RPM it goes for approximately 45-seconds, bogs down to 3,000-RPM, and then tries to fight its way back to a higher speed. 1 is the displacement, they generally have smaller combustion chambers, which means less fuel burned. I have changed the fuel filters, had carbs needes replaced, new. You will need to double check this needle setting by riding the bike under track conditions to confirm that there is no bogging or sputtering under most conditions. 8 knots as measured on gps. This ethanol attracts moisture (water) and debris which reduces fuel quality and may cause the engine to run rough (or not at all). Mercury outboard wont go full throttle. If the butterfly is fully open then engine bogs down when given throttle. Hi GuysI have a problem with this outboard - it won't take full throttle. Oct 11, 2020 — Genuine mercury marine, mercruiser and mercury racing engines, parts, propellers. Yamaha 40hp 2 stroke. Link to comment. Or 3, outboard in a test tank hooked up to a dyno, running at max rpm. I have a 2000 90 hp mercury 2 stroke and when going on plane sometimes the engine bogs down and is very slow to get on plane. 11-22-2010, 04:25 AM. The fuel used for your outboard motor can be one of the primary reasons why your outboard motor is bogging down. It will run at that rate for as long as I need to. Fuel in the last couple of years now has up to 10% ethanol. too dark (chocolate >black) indicates too rich, too much oil is being burned leaving a smoky black deposit on the plug. Give it the full throttle and she'd bog down because it was crushing the inner membrane. This is one of those annoying, occasional issues that seem to be hard to pin down, so here's my attempt to describe what has happened and the circumstances in the hope that someone here will be able to offer some advice on how to resolve the issue. 2008 Nautic Star 18 ft with a 90 Merc Optimax. com motor bogs down at full throttle Page: 1 - iboats An engine that hesitates, stumbles or misfires when accelerating or when it is under load, is an engine that is either sucking too much air, not getting enough fuel, or misfiring. I have a 2001 Tohatsu 15hp 2 stroke. My 225 horsepower Yamaha ox66 starts up just fine but smokes more than usual at startup and at low speed idle. Performance deteriorated over past month. bog = lean = Lower the needle clip (raises needle) one noch. Brian Polski Junior Member. iso, the color of the sparkplug is an indicator of how effeceint combustion is in the engine, too light (like it is) indicates being lean. Posted June 23, 2008. If it idles fine but it bogs down with throttle, your high speed gas jet is probably clogged. It is a 2004 VLX. Having a hard time getting the engine started, 2. 180 hours on the clock. 1, with the boat in the water at full speed 2, with the outboard in a test tank with a test propeller on it, running at max rpm. Once on plane though the engine is good to go and has no issues. It will get back to full speed but doesn't have the pep like when it first starts. Posted by gstewart63 on Mercury 50 1987 bogs down when full @ full throttle 13 posts Sep 12, 2013 Motor Runs great bogs down under load. gurgle = rich = raise the needle clip (lowers needle) one noch. 4 I receive boat install carbs same thing. Follow Mercury 115 4 Stroke surging. Idled fine prior and continued to idle fine, wouldn't die at idle RPM's. I recommend cleaning your carby the old fashioned. The repair manual doesn't help either. Proceeded to idle down the pearl river and went to open in up. Mercury Outboard drawing with Water Pump Parts - Drive Shaft, seal kit, impeller for 50-60hp 3 cylinder 2 stroke and 40-60 hp. Thinking it was a fuel supply issue, I gently squeezed the primer bulb (which was firm) in the fuel line, no change. 1987 115 HP Mercury outboard 2 stroke 6cyl. Suzuki Dt75 Dt85 2 Stroke Outboard Engine Full Service Repair Manual 1981 1992. This is due to a slightly lean mixture due to dirty jets, incorrect mixture adjustment or low fuel level on the float chamber, in turn due to flow restriction or faulty pump. Once started the throttle is very tricky, too much throttle and the engine dies, and/or 3. I have a 2008 4 stroke Mercury 60 bigfoot on pontoon boat. OEM Part Number Mercury: 8M0113801 / 43024A09. Boat/motor doesn't want to "pop" on the hole shot and plan out like usual. I bought a second hand bay boat about a month ago. The Suzuki DT 75, DT 85, 2-Stroke outboard repair manual basically is a manual which tells you how to repair, and maintain your manual. Also it seems to be using a lot of gas in my opinion. •Main jet (adjustable with optional jet sizes) * Controls fuel flow primarily 1/2 through to full throttle. Check spark plug; Replace if black and worn electrode is found. I take it to full throttle and it runs smooth for about 5 seconds and then it bogs down or lurches. When I would cruise at 2/3 throttle or less, no problem. Those are the only 3 ways to test it. replaced primer bulb, external water separator filter, and checked fuel lines for cracks. Has a major affect on jetting. they dont tell you when the tank get low the engine won't idel or run past 1/2 throttle, so you can never use the lower 1/3 of the propane tank. A throttle position sensor is similar to the motor cortex in the human brain, it controls one of the most important components of the car that keeps your engine running like a throttle body. Rig up a spark tester on the #1 cylinder plug wire. It it hard to start after shutting off and cranks similar to trying to crank it with the kill switch off. In both cases, reliability is far better than it was in decades past, fuel efficiency has increased, and problems like smoky exhaust and ear-splitting sound levels are ancient history. Jump to Latest Follow 1 - 9 of 9 Posts it too would bog down when I gave it gas. Re: motor bogs down at full throttle I have a 1984 Yamaha 50hp, 3 cyl, oil injected, outboard motor, low hours, and is in fairly new condition. Find the full specs for the Evinrude E-TEC. I have a 2000 90 hp mercury 2 stroke and when going on plane sometimes the engine bogs down and is very slow to get on plane. After sitting for an hour I cranked up to leave. 1,544 Posts. I have a 1982 mercury 80 hp outboard motor. on 5/29/13 at 10:26 am. The engine runs fine if you will apply almost full choke, butterfly barely open. I just bought a 2004 Bentley pontoon. The reason for this is it being a 2-stroke engine. 4 I receive boat install carbs same thing. Add To Cart. Start the engine, and do a full-throttle run down the straight, through all gears. 1990 Mercury 25hp Bogging down at full throttle and pulsating. Poor Gas Quality. Proceeded to idle down the pearl river and went to open in up. Throttle Full Bogs Jet Yamaha Down Ski. will idle nicely, but 15 hours ago — MerCruiser bogging down hesitating problem fixed. I idles fine and cranks with ease. Jul 27, 2013 #1. Ok guys, riddle me this. The motor (2003 Yamaha 115 2 stroke) starts and idles, no problem. Sat I took off from launch and ran fine. Topic: 90hp Mercury Bogs Down at High RPM. 5 - 4 - 6 - 9. posted 07-07-2013 10:19 PM ET (US) I launched my 2005 Montauk 170 with 90 Mercury yesterday. Keep in mind that a 2 stroke will never run "clean" like a 4 stroke and a good running 2 stroke will have situations. 115 4 stroke bogging down. Throttle Full Bogs Jet Yamaha Down Ski. Looking for input?. The bike has a fresh top end rebuild, though I dont think that helps cause it has done this even before the rebuild. 2008 merc 30 hp 2 stroke (nissan marine). After reading this thread, I pulled the plugs last night and both were oily and wet. HIDEA 2 Stroke 15hp Outboard Engine. When an outboard motor runs at speed but cannot hold an idle, it usually indicates a problem with the carburetor. Sounds like a needle problem. Posted March 2, 2014. I know very little about engines big and small. 11-22-2010, 04:25 AM. FourStroke carbureted outboards, and the 25/30 hp. Trolling motor issue. They are basically identical engines, with the 1 hp diff being I think just a carb jet. Access Free Mercury 60 Hp Bigfoot 2 Stroke Manual Mercury 60 Hp Bigfoot 2 Stroke Manual This is likewise one of the factors by obtaining the soft documents of this mercury 60 hp bigfoot 2 stroke manual by online. Suzuki DF30A bogging down. Here is the problem: engine starts and runs at low RPM fine. Fished a hour or so and started motor ran fine purred like a kitten. Long story short, it ran flawlessly for 2 straight days at all throttle levels then I went out last night and as soon as I got past 1/2 throttle, about to get on plane it would bog up and down. Hook up the timing light to the #1 plug wire. Also as mentioned already the air/fuel mixture tends to bounce when the valve closes stopping the intake. When was the last time your air filter was cleaned or is your air filter sitting flush. Will not run at full throttle I just installed a new 66cc china motor on a bike. Ok guys, riddle me this. If I romp it at lower rpms, it bogs and will drop to about 20 psi, even if running only 3,000. It has been running great the past few weeks. Prior to my purchase the previous owner, a friend, said he cleaned the carbs. 11-22-2010, 04:25 AM. Topic: Evinrude 90 Bogs, Stalls Under Load. Approximately half throttle, it bogs a bit and seems to not be getting full power. But the first thing to check, obviously, is if the fuel filter is clogged. Enhanced fuel injection (EFI models) for boosted efficiency. 2 stroke outboard loses power at full throttle. Ater it runs at full throttle for a few minutes, the RPMs … 2005 mercury 200 optimax My motor idles and runs fine at mid to low rpms but at high rpm it starts starts sputtering. Some water does come out the outlet tube, but not as much as used to when it was new. Have a DF30A about 2 years old with about 200 hours on it. So the issue im noticing is that when I give it throttle the carb doesn't open up to allow …. I have a 2004 Yamaha 115 HP 2 stroke saltwater series outboard. Search: Yamaha 2 Stroke Outboard Carburetor Adjustment. A typical new midsized outboard (90 to 115 hp) will cost you at least $9K if purchased from a discount dealer, and more like $10K+ if purchased from a local full-service dealer. Did you check to see if the needle is the stock needle or. they dont tell you when the tank get low the engine won't idel or run past 1/2 throttle, so you can never use the lower 1/3 of the propane tank. 1990 Mercury 25hp Bogging down at full throttle and pulsating. #2 · Nov 5, 2012. Once on plane though the engine is good to go and has no issues. About stroke 2 power at loses throttle full. 2 stroke loses power at full throttle Sep 28, 2021 · 10. Examples are found in Yamaha's PW80 (Pee-wee), and many two-stroke snowmobiles. It idles normally. 1999 50 HP Merc 2-stroke losing. Re: Mercury 9. it's new, but very hard to start. You should start to hear it pop, just keep pulling or kicking and holding it wide open until it starts, then rev the engine a bit to clean it out and keep it running, then warm it up properly. Yamaha Outboard Motor 2-stroke (S) Enduro 8 hp. 03-03-2016, 09:56 AM. Posted March 11, 2009. Search: 2 stroke loses power at full throttle. Engine will also run at 5,000-RPM (WOT) fine. we have a 13 year old yamaha 175. And this is most likely caused by the ethanol content of the gas. Outboard engines are popular in small watercraft because of their light weight and wide range of size for both low and high power applications. The bike has a fresh top end rebuild, though I dont think that helps cause it has done this even before the rebuild. When I would cruise at 2/3 throttle or less, no problem. Hi GuysI have a problem with this outboard - it won't take full throttle. The Mercury 25 HP EFI outboard motor 25MH model is a manual start outboard with 15-inch short shaft, manual start and manual tilt. It idles normally. I have changed the fuel filters, had carbs needes replaced, new. You should start to hear it pop, just keep pulling or kicking and holding it wide open until it starts, then rev the engine a bit to clean it out and keep it running, then warm it up properly. April 26, 2010 at 1:02 am #1267346. as I move lever forward, fuel pressure starts to drop and it starts to bog. About Throttle Outboard Yamaha Control. Search: Yamaha 2 Stroke Outboard Carburetor Adjustment. I have ordered jets, and I am wondering if it is a lean bog, or a rich bog, so i can. The low speed winding had no resistance at all, meaning there was a break in the winding somewhere, an open circuit. I changed the fuel filter but the problem persists. It is a 2004 VLX. Two stroke motors are VERY touchy in the tuning process, if they run too rich, they bog down and Two-strokes generally run lower compression. I have a 2011 mercury 115 HP four stroke serial number 1B843908 Started with having problems with bogging down at speed. Rebuilding an older engine of the same size might cost about $3. Factors such as propeller pitch, weigth, hull / water conditions, etc. It mixes the right amount of fuel and air for combustion, with the mix being sucked into the engine by a vacuum. I cleaned the carbs, changed the spark plugs and gave it fresh gas. 01-27-2007, 05:56 PM. Johnson 50 HP Outboard-Bogging Johnson 50 HP Outboard-Bogging. For some FREE Pr. as I move lever forward, fuel pressure starts to drop and it starts to bog. Add to cart. Jul 27, 2013 #1. Enhanced fuel injection (EFI models) for boosted efficiency. Increased fuel economy and outstanding overall performance. By contrast, an engine that is rich will tend to bog. Put it back together and it should run great. may affect the consumption figures. •Main jet (adjustable with optional jet sizes) * Controls fuel flow primarily 1/2 through to full throttle. The easiest way to test it is to do a throttle-chop test. works great and you can buy it in bulk or Academy Mar 02, 2021 · Two Stroke Outboard Shaking - easy carburetor linkage sync check and adjustment. All the cylinders have pretty similar compressions, tried 2 different tanks of fuel so don't think it is the actual fuel or the fuel lines but will get some additive and try that. First, you're probably not opening the throttle all the way and second,. About stroke power loses throttle at 2 full. 1999 DT25 2- Stroke Oil Injected Engine Won't Start After Service and Seafoam 04-26-2020, 04:02 PM and at full throttle it was only running 15mph and would eventually bog down and cut off. I have a 2001 Tohatsu 15hp 2 stroke. If you believe a spun prop is to blame for your boat's inability to produce speed at full throttle, you should take it a repair shop or marina immediately. 4KW / 6HP, type: 2-stroke Superior engine water cooling system for better engine performance. If it idles fine but it bogs down with throttle, your high speed gas jet is probably clogged. There is basically 3 ways to do this. Those are the only 3 ways to test it. ) Apply marine sealer to the shanks of bolts, not the threads. It will get back to full speed but doesn't have the pep like when it first starts. I have a late 80's Mercury outboard motor on my boat. I have a 2004 Yamaha 115 HP 2 stroke saltwater series outboard. It it hard to start after shutting off and cranks similar to trying to crank it with the kill switch off. It has a 2004 90hp 2 stroke. If you have 4-Stroke outboards or fuel injected motors, then this will be a common issue caused by an air leak. Yamaha Jet Ski Bogs Down Full Throttle. Held to a Higher Standard. Mine starts no problem but when going full throttle it will die sometimes or takes forever to get going but it never gets top speed. It starts up fine initially and idles fine. This is commonly caused by a deteriorated intake inlet manifold. Hi GuysI have a problem with this outboard - it won't take full throttle. Fortunately, this article will cover all the most likely and unlikely problems that make a 2 stroke or 4 stroke dirt bike bog or sputter. Is your 2 stroke dirt bike bogging? Does it stop accelerating when you open the throttle quickly? If your bike has bogged going up a hill and caused you to stop, then you know how frustrating it is. My mechanic said it idled just fine in the water tank. 61410-96843-0ep Suzuki - $1100. Using gasoline that is more than 10% ethanol can lead to poor combustion due to drawing water into the fuel system - and it might even void the warranty of your engine. Check spark plug; Replace if black and worn electrode is found. For some FREE Pr. The fuel air mixture screws on the side of the carburettor are marked H for High for the engines high speed adjustments and the L means Low for the engines low speed adjustments. I have a 2000 90 hp mercury 2 stroke and when going on plane sometimes the engine bogs down and is very slow to get on plane. 1990 Mercury 25hp Bogging down at full throttle and pulsating. [The Evinrude 90-HP outboard] starts and runs great but under load she bogs and stalls. Divide the spaces up even again until idle, 1/4, 1/2, 3/4, and full throttle positions are known. Idled fine prior and continued to idle fine, wouldn't die at idle RPM's. Posted June 23, 2008. I need to know what else to check to diagnose this problem. The supply of this oil is controlled by the throttle position and engine speed.