For electric-starting models, youll want to check the main fuse to confirm its not blown. & Circuit Outboards, Shop x, You need to be a member in order to leave a comment. This engine have single carb? 
Ill see if I can compress it. You should also measure the spark plug gap with a wire thickness gauge to confirm the gap falls within the range listed for your model. Grills, Boat Drink Instruments, VHF Radios & All connectors are clean. As per the other comment above there are other possibilities but before we start ordering and changing parts I thought we should try the simple stuff first. Adjust it with a spark plug gap tool if necessary. For a better experience, please enable JavaScript in your browser before proceeding. I didnt actually know this was a thing. Right that makes sense. When its completely charged, reinstall the battery and cables. CREATE JavaScript is disabled. I have a 2007/2008 25hp Yamaha two-stroke that Im trying to diagnose an issue on. Hitches, & Restart the engine to see if the vibration has stopped. Please feel free to contact us or stop in today for all your outboard motor needs! If your 100% sure that the carbs, fuel pump are good than I would start trouble shooting the ignition. Youll want a professional to handle this as soon as possible.Youll also want to check the engine oil levels. That happened to me last year. Carefully scrape away any corrosion on the battery terminals with a wire-bristle brush. Storage Dont worry about the brand, the principles are the same. Honda 5hp Outboard, Boat
This engine have single carb? Copyright 2019 IBOATS. Accessories, Electronic Navigation
New plugs. First, check the fuel system to ensure there is enough fuel in the tank. Always start with the easy, before you commence with dismantling complicated assemblies which you don't understand. Maintenance, Pumps and Checked compression - 125 psi in one cylinder and 122 psi in the other. Zincs, Generator ha ha! Wells, Toilet & Waste Acessories, Fishing Outriggers & Copyright 2000 - 2022, Outdoor Network LLC. Maintenance, Boat Cleaners & http://www.boats.net/parts/search/YaTOR/parts.html, If this is your first visit, be sure to 2022 Eric's Outboard - Marine Service Inc. - Powered by ARI Network Services - ARI Responsive Websites, 8755 SW 129th St Thanks AllDodge - yes, I struggled with the site not working earlier! New In-Depth Outdoors TV episodes return this Fall, Sundays at 8 a.m. on the Fox Sports North channel! Don't discount a dirty/ clogged fuel pick in the tank itself. I think it's either the coils or power pack, Had the carbs professional done getting rebuild kit for fuel pump tomorrow. New plugs. Remove float (watch for fuel shut off pin falling out and getting lost), You will find the main jet 'inside' the top of the 'bowl' screwed into the body of the carb. Could be Water in the Fuel?drain the Carburetor and check for Contamination.just a couple of drops can cause Erratic Running. All content remains the copyright of its respective owner. Thanks perkdp. Deals, Boat Seats Hardware, Boat Seat Ropes, Boat There are a few steps you can take to troubleshoot starter issues. Come join the discussion about engines, modifications, classifieds, troubleshooting, fishing, boating, poles, maintenance, and more! If you do it yourself use your mobile phone to take pictures of everything you do, as you do it. I've also gone through and cleaned the fuel pump and filter, replaced spark plugs and endlessly tweaked the air mixture screw. And clean and adjust the carbs as mentioned already.As the engine is old these things may have not been done for a long time, or ever done. Are the spark plugs clean and correctly gapped? Next, check the fuel lines that connect the Yamaha outboard motor to the fuel tank. ha ha! Thanks for your help guys, but I don't actually know what a jet is? If youre experiencing issues with the engine starting or running, there are some troubleshooting steps you can try. You can count on our Yamaha Certified Master Technicians to get to the bottom of it. My little 2hp 4 stroke had a blocked jet one year when i forgot to drain the fuel over winter, fairly easily cured if you can find instructions. At the dock with engine warm, I would richen by about 1/8 turn increments (turning mixture screw out is rich) and allow it to run and see what happens. ha ha. We have placed cookies on your device to help make this website better. Covers, Boat Cover Fenders, Boat Trailer Holders, Cabin Accessories & I am at a total loss with my Yamaha outboard 25Hp engine. Might be nice to know if the throttle is being advanced for a cold start or is it fully retarded. Tops, Other Mine had all kinds of trash caught up in it.
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We hope these tips for troubleshooting your Yamaha 4-Stroke Motor have come in handy. Terminals, Marine Fuse Blocks & When you pull the choke knob out do the choke plates fully close? Waxes, Boat Cleaning Thanks for replying I have pulled the cover off the fuel pump and there was some gunk in it so I cleaned the best I could but I couldn't take the whole pump off the carb. Accessories, Big Jon Are all of the cdi connections clean? But at least I have got some really good advice on how to clean and care for my engine and how to clean the carburettor. It ran good at idle, but it wasn't getting enough fuel and it would fall on it's face under load. You guys rock the fuckin ocean x, Alan de enfield thanks so much for taking the time to write that for that really careful and detailed guide.
It's a part of the carb float bowl. Ran awesome for a couple months then developed a similar problem to yours. My 30hp had a few that were corroded really bad including the ground when I bought it. & Harware, Marine Nuts, Bolts, &
Fishing Lures, Fishing Rod Holders & Blocks, Marine ACCOUNT, Find The idle jets in a carb are much smaller than the high speed one. I'm fighting this monster harder than ever. Ha ha. JavaScript is disabled.
Installed a new one and gasket. In fact, it's just been a "cantankurous" SOB since I got it (probably the reason the previous owner sold it). Pumps, Livewell Aerator Pumps
Manufacturer, Boat Tables & Racks, Fish Finders, Sounders I did manage to foul a plug on mine from idling a bunch and it caused the motor to act up. Rafts, Paddle If youre still experiencing issues, please contact your local Yamaha Outboard Dealership. If not, its time to bring it in for an inspection. What should I be looking at in terms of fuel delivery? I will totally be using that when I try to clean up my little engine which I am sure it needs. Pull the carbs and have them ultrasonically cleaned, new fuel filter, and plugs, things that should be done anyway and start there. AN While youre at it, check the propeller shaft for damage.
Use the hairbrush bristle again. If your primer bulb feels like it has air in it when it acts up, put a whole new line and bulb in. Remove them with a spark plug wrench so you can inspect them.
Deals, Trailering There are plenty of videos online showing how to adjust an outboard carb. Dont forget to completely dry the terminals with a clean towel when youre finished.If the battery is damaged, you should replace it. I went through the fuel pump again and found a small hole in diaphragm. Jacks, Boat Trailer Brakes & Have you tried adjusting the carb to richen the mixture a little? I have a 1989 20 LG with dual carbs. They all seemed pleased that I wanted to learn and were happy to teach me. Accessories, PWC Parts & Take the fuel hose connector off the tank or off the engine, whichever is easier. Smoke All times are GMT-5. The cable had shearedoff at where it's bolted to the outboard engine and turns a bit that tells the engine when to go from forward/neutral to reverse. What do you reckon though? some super brilliant advice here so thanks very much. Forums, Find Plumbing, Fresh Water Boat | Key Largo, FL 33037. check out the. Financing, Iboats Protection, Ladders, Steps, & This page was generated at 1 minute ago. When the engine is cold, I usually have to keep revving (and sometimes rapidly pulling out the choke and pushing it back in) to keep it running. I'm curious what oil ratio do you use? Once you have seen it done its quite a simple operation and well within normal 'DIY' skill requirements. Your fuel pump could be getting weak as well. Any advice you might be able to give on this would be amazing! Hold it in a 'tub' as petrol will leak out when you tip it upside down to remove the bowl (float chamber). Wipe the dipstick off with a clean cloth, reinsert it, then remove it and check the oil mark. Riptide Terrova 80 Trolling Motor w/i-Pilot & Bluetooth, Inflatable If not that would cause fuel starvation and the engine might well run on idle but nor rev p. The air vent on the tank is open so its not that but thanks for the attempted problem solving! Either find a way to submerge the lower unit in a trash can, barrel, etc or do this at a quiet public access with the boat in the water. As has been said above, check that the cable is actually connected to something at the outboard end. So I am now about to watch any videos on youtube I can find to learn how to replace this myself. Alan de enfield thanks so much for taking the time to write that for that really careful and detailed guide. Parts, Rule 1500 GPH Automatic
Had the carbs professional done getting rebuild kit for fuel pump tomorrow. It goes without saying or at least it should that you should check all other obvious things before making any adjustments. If theyre burned or cracked, you should replace them with the type of spark plug specified in your owners manual. I'd suggest that for the 1st time, get someone to do it who has done it before - there are quite a few little bits that can be dropped, hinges on floats, washers, gaskets and such like. One it is warm, it will accelerate from idle without bogging or stalling. Lights, Boat Trailer Tops, Bimini Top The more Ive used it, its gotten worse.
Marble, Engine Hey alan its a 2-stroke, and saying as I had never heard of running it dry before stopping this is obviously something I have never done. Covers, Boat Wiring & very helpful! When I purchased a used 2006 25hp I went thru carbs, installed new plugs, cleaned fuel filter and installed new Yamaha fuel line assembly that terminated into tank with a brass 90 fitting and hose clamp. I have a 1989 20 LG with dual carbs. Insurance, Boat Motors, Fishing Downriggers & Youll need to replace it with one of the same amperage, which you can find listed in your Yamaha outboard owners manual.If you dont have a blown fuse, your next step is to check the battery. Be sure to safely disconnect the negative cable followed by the positive cable before you remove the battery from its housing. Have I got that right? Detectors, Binoculars & Guide, Boat Rails, Marine Tools & Tool Make sure you have a correctly sized screwdriver and remove the jet (lefty loosy, righty tighty), Once removed you will see holes in the end of the jet (running lengthwise and probably crosswise at the tip of the jet). Parts, Sacrificial Anodes & What happens if you remove the air filter on top of the carburettor while it's running? Fishing Forums I was saying it would seem odd if it was a spark issue given these symptoms. ha ha! Blocked jet - I had that problem on a Seagull years ago. Ski, Wakeboard Caulking, Marine Engine
The motor would rev up in gear get on plane and the bog way down. Maintenance, Fiberglass & Epoxy The engine started fine and goes low revs fine but wont go anymore than that no matter how much throttle I give it. Distribution, ProMariner ProNautic yes compression make a big difference in how well a motor runs, so you can get a loaner tool at most auto part stores and pull all plugs to test all cylinders. And super thanks to mike hurley for stating the obvious because obviously I need it stated. High Back Reclining Helm Seat, Cabin and Switches, Shore Power & AC If it is 2-stroke then the petrol evaporates in the carb leaving a gummy-oil residue that blocks the jets. Seats, Offshore Boat But I don't understand how you would 'turn off the petrol' before the engine? I'm stumped and really sick of fighting this beast. Sorry to have bothered you all with this mystery problem when a simple look around my engine would have totally confirmed what it was. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. & Sonar, Trolling Also have a look at what moves on the engine when you open and close the throttle. Make sure the motor is upright and level before removing the oil filler cap and dipstick from the oil tank. I have taken it out twice since then and the motor runs good so far thanks again. The motor is new to me this summer, bought it from someone who only used it 1-2 times a year in the Boundary Waters. If youre not sure where to begin, then youve come to the right place. Viewing 11 posts - 1 through 11 (of 11 total), trim.20FEEC57-AFBE-4047-A68E-C8A96CE83816.mov, For Sale: Left Handed Rifle Remington 700. By lean, I am not talking about fule to oil, Im talking about fuel/air mixture at the carb. I thought the carbs were dirty for sure so I rebuilt them and all three looked perfect. Fuel issue? This is the video you need. There aren't many folks on here with outboards, so you may not get many responses. Covers, Boat Seat and thanks cereal tiller, I will have a look at how to drain the carburetor. Anchor Box Anchors, Fishing Rod & Reel This is what I watched before I replaced mine. I might be stating the obvious but have you checked the throttle cable has not snapped/come off? On the first few trips out this summer the motor ran like a top at wide open throttle and would troll for hours on end at the lowest setting without issue. Both are relatively cheap fixes and are considered maintenance items, especially if you run oxygenated fuel. Pumps, Marine Pump Replacement
Login, Boats It will normally clear quite easily just by soaking and blowing. Any suggestions about what this could be? This motor is driving me nuts. PFDs, Roof Racks, Carriers, I used grease on the thermostat housing gasket to prevent it from sticking so that I can re use it. I moored up and had a look at the prop and pulled some weeds out but nothing serious and then tried her again. The Fora platform includes forum software by XenForo, https://shallowwatersolutions.com/troller_support_legtsl, Outdoor Hub, LLC (d/b/a Carbon Media Group), 30800 Telegraph Rd, Suite 1921, Bingham Farms, MI 48025 USA. I suppose you have unscrewed the air vent screw that is normally in the tank filler cap! If it will still not clear, go back outside, (off the boat) pour some petrol into a tub and put the jet in to soak for an hour or so, dry off and try blowing thru it again. Does compression affect idle? Terminal So you finally did the compression test and that looks good. Wait a couple minutes the back to WOT then bog down. When they get old, cranky, worn, and hot, they start to short out. Does it just quit if you idle too low? Once again, if you find damage, youll need to take it in for repairs. The fuel line I bought new last summer so I doubt it is that. Yes it is a snapped throttle cable!!! They tend to rotate the stator that sits below the flywheel. Towers, Tow Ropes & Locks, Boat Deck The Right Fit, Shop By Im not opposed to having a tune-up done since the motor is new to me, but Id like to try to see what I can do on my own first. Accessories, Marine DC Power Plugs Meters, Marine Electrical Panels & Live Bait Your friends at Erics Outboard Marine would be happy to help. Next, use a pair of pliers to remove the fuse holder. Deals, Electrical Cushions, Lexington Screws, Boat Handles, Pulls, Good advice though. Community Hardware, Marine Bilge Pumps, Shop Appreciate the feedback. If its not engaging or turning over, you may have a faulty electrical system. A forum community dedicated to Small Skiff owners and enthusiasts. http://www.boats.net/parts/search/Yamaha/Outboard/2002/25MSH3A/CARBURETOR/parts.html. Ventilation, Interior & Cabin & Dock, Anchor Chains & Or can point me towards any youtube videos that I might be able to follow to fix it. Parts, Inflatable Fasteners, Boat Windshield
Unfortunately neither the adjustment to the fuel/air mix or pumping the bulb made a difference. Boarding, Paddles & Try to warm up the engine before making any adjustments if possible. There is less vacuum to say, run a weak fuel pump. In the Miami area, contact Eric's Outboard Marine Service. Tables, Minn Kota I took a video of the issue but its too big to attach here. If anyone has any advice that might help I would really appreciate it. Keep an eye on the thermostat. On 02/07/2018 at 11:55, Mike Hurley said: Yamaha outboard 25hp suddenly wont go into high revs. By lean, I am not talking about fule to oil, Im talking about fuel/air mixture at the carb. Hardware, Boat Cabin Powered by Invision Community. Presuming you have a portable fuel tank have you checked the air vent is undone? reset all the timing, spark advance and idle stops. I check it often now. Deals, Electronics Sockets, Marine Electrical In future : Turn off the petrol before stopping the engine, keep it running until it either starts to 'race' or starts to 'hunt', then turn off the ignition and the carb will be dry and won't get gummed up. Took the boat out for a couple hours today. Yamaha Outboards: Click here to browse the models. I've owned it a few years, but have never been able to get a satisfactory idle. If theres no damage, the next step is to remove any seaweed or other debris that might have become entangled in it. All, Anchor & Did some fishing on the trolling motor (just one pike) and then ran around at full throttle for a while and brought it back to the dock to tinker. Kits, Seadog Stainless Steel Cup If the levels are low, refuel it with the appropriate gasoline for your model. I have just had to clear my Son's OB for exactly that reason. They only last so long. Nonetheless, this is the kind of help I need!
Parts, Boat Tubing & Yes, but I would not bother for an overnight shut-down or for a day or two. Winches, Boat Motor Supports & If not, you can proceed to charge it. The outlaw or pirate mindset is very liberating and free of stress. Adjust from there. Accessories, Pontoon Bimini Boats, Propeller Parts & Kits, Boat Trailer Maybe it's going into limp mode? & Rings, Prop Nut Kits & Trolling Motors, Shop Someone just said to me that it was probably a fuel issue and I totally believed it without investigating myself!