The issue was that the replacement needle didn't have the black plastic cap on it, which kept the float from pressing on the needle & caused the carb to flood. I have had a similar issue with another model. I also removed the jets and cleaned them with carb cleaner. I hadn't realized that it was missing, so it was an easy fix. The design of the motor made cleaning them relatively harder. Now the throttle shaft opens and closes properly, but the engine runs poorly. My 15-HP Yamaha Enduro 2002 2-stroke outboard had been running sluggishly and decided to purchase a carb rebuild kit, which I installed before recommissioning the motor. Good luck. Troy Mattia is a Real Estate agent by profession and an angler by passion. Platforms, Slide Replacing them was the only option, and the difficulty in this design-led to most of the 4-stroke 40s going to fuel injection. The modern fuel-injected Yamaha 40 outboard has 2 fuel filters, 2 fuel pumps, a vapor separator tank (VST), a VST filter, and a high-pressure fuel rail. the clip/spring is there to pull a stuck needle out of the seat if the fuel gels slightly, but they can also cause your issue if too tight. Seats, Pontoon Boat Seats & Note, however, that 2-stroke engines themselves are not really illegal. Guide, Boat Kits, Boat Trailer Bullet Skimmer, Paint and It is simply that most of them do not meet the legal emission requirements. The Yamaha 40 is a little more compact than most other outboards in the same power range, particularly in its chief rival, the Honda 40. These failures can cause your motor to stall, run roughly, and even misfire at times. Copyright 2000 - 2022, Outdoor Network LLC. But microbes grow inside fuel when the fuel sits for too long in summer. Glad you got your problem solved. Did you remove both high/low speed jets and spray carb cleaner through the passageways? Outboards, Shop & Sonar, Trolling . Supplies, Boston Whaler, 1972-1993, You don't want to break a tiny wire off inside there.). Seats, Fishing Boat You can do it by yourself. It's not fully sealed at the shaft. Oars, Wakeboard, Wakesurf & Question: How often should I service my 4 stroke motor? Yamaha 40 outboards have been built both ways over the years, though most are now fuel-injected. JavaScript is disabled. non-adjustable and that saddle type float needle retainer isn't normally a problem. If your motor will rev but won't idle, that's where the issue is, that idle circuit. Best to drain each carb with float chamber drain screw..removes any water/debris/etc. If this was my problem with a 2016 Yamaha, it would be a warranty repair. Almost certain that the float is set wrong. This is also possible in 4-strokes when the oil filter is clogged, or the oil injection system has gone bad (like a cracked or clogged hose). Little less than a year ago, I purchased this new Yam 4/4 and used it to upgrade from 6 year old 2.5 Suzuki 4 stroke. Ski, Wakeboard Kits, Seadog Stainless Steel Cup Almost all carbs could use some fine tuning with the mixture screw depending on what your climate is like. It may not display this or other websites correctly. Deals, Electronics This is just a brief description of the 5 common problems that you might face. Downs, Couplers, Mounts, Copyright 2019 IBOATS. If your fuse is okay though, there could be an issue with your battery. Almost anywhere you find yourself to be, there is an excellent chance you will have access to service, should any problems arise. But, if youve something broken and it needs to be bonded, try. These are complex stuff so dont try to do this by yourself. It can go either way, on some it meters the air, on others it meters the fuel, so I never say anything but turn it either way and see what helps. Not all of them happen to everyone though. Blocks, Marine But that was after literally hundreds, if not several thousand, hours. For a better experience, please enable JavaScript in your browser before proceeding. In some cases, youll need to replace something or call a professional. AN How often should I service my 4 stroke motor? Suzuki 2.5 fires 3rd pull, same gas, same storage, same everything.I have the cheapest Troybilt power washer sitting right beside it gas stays in it for months at the time use it about every 3/4 months cranks 3rd/4th pull. and what's the story with clogged strainer? When it fails, this can lead to misfires and rough running, and even stalls. To begin with, you could have issues with the carburetor. Are you interested in knowing about them in detail? All times are GMT-5. If the fuse is OK, check the battery by carefully disconnecting it and cleaning the terminals. The carburetor mixes the right amount of fuel with air in an engine, which gets sucked into the engine. I always flush after use and turn gas valve into off position to allow gas in carb to burn out so no gas left in carb. But, if youve something broken and it needs to be bonded, try marine tex or jb weld. This can cause problems ranging from simple rough idling, misfiring at higher speeds to the engine cutting out constantly. Youll be able to identify that quite easily by just inspecting the wires visually. Covers, Other Like engine misfiring when at high speed, engine shutting down frequently, rough rides, and many more. Failure of the Oil to Lubricate the Cylinders, General Pros and Cons of the Yamaha 40 Outboard. Sockets, Marine Electrical Regardless of the reason for the failure, this causes the pistons to run dry, and they will expand and seize up in the cylinder. Outboard motors are usually built fuel injected or they use carburetors. You can face this problem if you have a clogged oil filter. There is also one Vapor Separator Tank (VST) and a VST filter. Then dealer says running it on flush not good enough, need to run it at high RPM in the river. if there is no sign of water in the gas can but there was in the motor tank then it must be from condensation. Just scroll down and read the article. You must log in or register to reply here. Fishing Lures, Fishing Rod Holders & You have to remove the alum. Is this a cold start issue or a flat spot issue within some RPM range? For a better experience, please enable JavaScript in your browser before proceeding. Well, this is just about all the yamaha 40 hp 4 stroke problems. Protection, Ladders, Steps, & This mixture of air and fuel gets sucked inside the engine. Sound like you have plugged passageways somewhere. Yamaha makes some of the most popular boat engines globally, and their 40 horsepower outboard is very common. check out the. To check if your fuse is alright, take off your electrical cover first. CREATE Professionals. The CDI is the most recent Yamaha 40 engine that can store information to be connected to a dealers computer and diagnosed. Breakers, Power Packs & Jump Blow with an air compressor? & Tubes, Shop Biminis, View Or, if your oil injection system goes bad. Boat Gel Coat - Spectrum Color, Pumps and Covers, Boat Shrink Wrap Maintenance, Pumps and Boat Repair, Boat Paint & JavaScript is disabled. Marble, Engine Handles, Life Jackets & They are among the most low-maintenance brands available. Accessories, Pontoon Bimini Locks, Boat Deck This makes it a little bit easier to deal with maintenance. yup. Some crud on the inside of the float bowl. These 5 problems are mostly faced by people. The most important reason, though, and the biggest reason for any outboard owner, is their reliability. Among those problems, there are 5 that stand out. Rollers, Boat Trailer This combustible mix is what allows your engine to run. Yamaha makes 40 horsepower motors in both 2-stroke and 4-stroke varieties. Thanks very much for your feedback. Recharge your battery and put it back inside. Marine Battery Chargers, Shop cap over adjusting screw and remove adjustment needle. I have a 2006 T25TLR 4 stroke motor and its having accleration issues will not take fuel from 2800 to about 3400rpms will run under 2500 fine and if I power up past 3500 it runs great up to 5500. Maintenance, Fiberglass & Epoxy Modern fuel systems on outboard engines are complex. Vinyl, Floating Boat This leads to scoring in the cylinders and the pistons getting stuck. Tackle Boxes, Fishing Bait & Protection, Dock Storage & Accessories, Big Jon for Sale, Buy A Shop Furniture, Boat Seat Pedestals & Harware, Marine Nuts, Bolts, & Deals, Trailering Fasteners, Boat Windshield The failure in a fuel system may also be outside of the engine, in the tank hose, connectors, or even the priming bulb. The max record is 55 km/h. Deals, Camping & RV Copyright 2022 | We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. fuel level in the bowl is too high. The capacitor discharge ignition (CDI) can fail. Yamaha outboards are also quieter than most other brands, again in particular comparison to Honda.
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