I'm stumped and really sick of fighting this beast. You must log in or register to reply here. water under the bridge. Looked motor over real good and found loose bolt. Keep an eye on the thermostat. Does it continue to run after the problem shows up? 
Covers, Boat Seat Covers, Boat Cover Financing, Iboats By lean, I am not talking about fule to oil, Im talking about fuel/air mixture at the carb. I've owned it a few years, but have never been able to get a satisfactory idle. Both are relatively cheap fixes and are considered maintenance items, especially if you run oxygenated fuel. It has just snapped in two so mystery solved. Does it just quit if you idle too low? Switches, Shore Power & AC very helpful! If youre experiencing issues with the engine starting or running, there are some troubleshooting steps you can try. If you find that the connection at the center of the fuse is broken, then youre dealing with a blown fuse. Acessories, Fish Cleaning Drink Holders.
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http://www.boats.net/parts/search/YaTOR/parts.html, If this is your first visit, be sure to Hardware, Boat Parts, Boat Tubing &
Seats, Fishing Boat Maybe it's going into limp mode? General Discussion Forum 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.
If the levels are low, refuel it with the appropriate gasoline for your model. They tend to rotate the stator that sits below the flywheel. When I adjust the idle screw down to a more normal range (around 700 RPM - in neutral), it will steadily lose RPM and quickly die. Charts & Protection, Ladders, Steps, & Definitely if you are leaving it for a longer period. So you finally did the compression test and that looks good. ACCOUNT, Find Come join the discussion about engines, modifications, classifieds, troubleshooting, fishing, boating, poles, maintenance, and more! There are plenty of videos online showing how to adjust an outboard carb. Don't discount a dirty/ clogged fuel pick in the tank itself. Have you tried adjusting the carb to richen the mixture a little? The engine has plenty of power at high speed, so I "assumed" compression was good. Caulking, Marine Engine We hope these tips for troubleshooting your Yamaha 4-Stroke Motor have come in handy. It's easy enough to remove the cable and install a new one. They only last so long. Racks, Fish Finders, Sounders 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). Presuming you have a portable fuel tank have you checked the air vent is undone? No matter what model you have, there will eventually come a time when you may need to troubleshoot some common issues. Fuel issue? for Sale, Buy A If its not engaging or turning over, you may have a faulty electrical system. All, Boat Bimini First, check the fuel system to ensure there is enough fuel in the tank. Thanks for all or any help you can offer. Accessories, Pontoon Bimini Hardware, Boat Trailer The idle jets in a carb are much smaller than the high speed one. I have a 2002 yamaha 25hp 2 stroke 3 cylinder. For electric-starting models, youll want to check the main fuse to confirm its not blown. Remove the Spark Plug(s) and compare, are they grey or black and are they both the same colour? The black plastic center piece is all you need to work on. It is not odd at all. I might be stating the obvious but have you checked the throttle cable has not snapped/come off? Vinyl, Floating Boat I always turn the fuel off until it runs dry (when I remember) and drain down over Winter.
Kits, Boat Trailer I have the same motor and it had a very small hole in the fuel pump diaphragm and it caused the same type of problems. Good luck and don't be 'frit' to try it. New plugs. Bullet Skimmer, Paint and Parts, Rule 1500 GPH Automatic There is less vacuum to say, run a weak fuel pump. When its completely charged, reinstall the battery and cables. Oars, Wakeboard, Wakesurf & Thanks for all your help as usual you wonderful boaters. Deals, Camping & RV It will normally clear quite easily just by soaking and blowing. Accessories, Boat Lift Canopy So helpful it's not true!!!!! Professionals.
Boat Gel Coat - Spectrum Color, Pumps and 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. Screws, Boat Handles, Pulls, Ha ha. 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. Any suggestions about what this could be? Use the hairbrush bristle again. It also has a clean tank and hose filled with fresh ethanol free marine fuel. Might be nice to know if the throttle is being advanced for a cold start or is it fully retarded. Smoke Video, GPS Chartplotters & Sign up for a new account in our community. One it is warm, it will accelerate from idle without bogging or stalling. Forums, Find Honda 5hp Outboard, Boat That way you can return it to its original position if this turns out not to be the fix. For a better experience, please enable JavaScript in your browser before proceeding. I will totally be using that when I try to clean up my little engine which I am sure it needs. Typically outboards have a mechanical link that advances the ignition as you open the throttle. I'm curious what oil ratio do you use? Does compression affect idle? I have just had to clear my Son's OB for exactly that reason. It seemed odd, but it never actually died. Holder, Anchor & Dock 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.
Plumbing, Fresh Water Boat Marine Battery Chargers, Shop Biminis, RV & Trailer ha ha! Cleaned and reinstalled with Blue loctitie. Have I got that right? Maybe the tick-over jet is clear, but the main jet (that comes into play at high throttle levels) is blocked ? All times are GMT-5. Next, check the fuel lines that connect the Yamaha outboard motor to the fuel tank. In the Miami area, contact Eric's Outboard Marine Service.
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. Telescopes, Covers and
The Right Fit, Shop By Alan de enfield thanks so much for taking the time to write that for that really careful and detailed guide. If not, its time to bring it in for an inspection. Now, I can barely keep it idling in neutral for 30 seconds without it dying, and Ive also noticed that while trolling at the lowest speed it will kill from time to time. Unfortunately neither the adjustment to the fuel/air mix or pumping the bulb made a difference. This motor is driving me nuts. Your fuel pump could be getting weak as well. Take the time to clean off any other debris or buildup with a solution of one cup of water and one tablespoon of baking soda. All content remains the copyright of its respective owner. Tables, Minn Kota and thanks cereal tiller, I will have a look at how to drain the carburetor. Lighting, Marine Teak & Rings, Prop Nut Kits &
| Key Largo, FL 33037. When you pull the choke knob out do the choke plates fully close? I don't have an RPM gauge, but have a good idea that if I keep the RPMs over 1000 it will idle, maybe a cough every once in a while, but it will recover on it's own. Thanks AllDodge - yes, I struggled with the site not working earlier! Dock, Cabin and Do you always run it dry before stopping ? Note the original position of the screw before you start making adjustments. It is very very appreciated and I hope you all having a beautiful and un-broken down day out there on the water. The more Ive used it, its gotten worse. 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. I have a 1997 Yamaha 25 HP (MSHV) outboard. Boat Repair, Boat Paint & Hitches, & Its no secret that Yamaha offers one of the most impressive 4-stroke outboard motor lineups on the market. The engine started fine and goes low revs fine but wont go anymore than that no matter how much throttle I give it. 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. It goes without saying or at least it should that you should check all other obvious things before making any adjustments. Plumbing, Anchor Outboards, Shop Accessories, Marine DC Power Plugs Even when I gunned the throttle it still just stayed in low revs.
Powered by Invision Community. Lights, Boat Trailer If you find any breaks or leaks, you should stop using the engine. Login, Boats A forum community dedicated to Small Skiff owners and enthusiasts. Try to warm up the engine before making any adjustments if possible. Accessories, Marine Electrical Blow down the holes and try and clear them, if you cannot, then try a single bristle from a hairbrush or toothbrush and gently poke it thru. Wells, Toilet & Waste Fenders, Boat Trailer Any suggestions where to start? I didnt actually know this was a thing. Parts, Inflatable Tops, Other Wait a couple minutes the back to WOT then bog down.
Thanks I will look into it. Systems, Lowrance Hook2-4 GPS Guide, Boat Your friends at Erics Outboard Marine would be happy to help. Ideally remove the carburettor (normally just 2 bolts), disconnect fuel hose, disconnect throttle and choke cables and remove from the engine. No there is no such thing as a standard gap. Right that makes sense. Once you have seen it done its quite a simple operation and well within normal 'DIY' skill requirements. You have 4 threads now, yes the website still has some issues.
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Sorry to have bothered you all with this mystery problem when a simple look around my engine would have totally confirmed what it was. Accessories, Boat Appreciate the feedback. I have been advised that it might be a fuel line problem or fuel flow problem. Accessories, Big Jon Platforms, Slide You can count on our Yamaha Certified Master Technicians to get to the bottom of it. Varnish, Marine Adhesives, Software, Digital
I have done this in the past with plumbers, mechanics, electricians, brickies, decorators etc. Boat, Sell A It wouldn't start at the launch this weekend, so the problem has gotten worse.
Carefully scrape away any corrosion on the battery terminals with a wire-bristle brush. Boat, Boat Buyers Could also be a fuel line problem. Holders, Cabin Accessories & While youre at it, check the propeller shaft for damage. Another common issue that you may need to troubleshoot is vibration. I had the bolt that goes through the accelerator arm loosen. I went through the fuel pump again and found a small hole in diaphragm. I am at a total loss with my Yamaha outboard 25Hp engine. Deals, Dealer If youve run 6-8 tanks this summer, Im not betting on bad gas. Copyright 2019 IBOATS. High Back Reclining Helm Seat, Cabin and I have a 1989 20 LG with dual carbs. Trolling Motors, Shop Forums problems seem to be solved. Dont forget to completely dry the terminals with a clean towel when youre finished.If the battery is damaged, you should replace it. Riptide Terrova 80 Trolling Motor w/i-Pilot & Bluetooth, Inflatable Savers, Boat Trailer Guides & Be sure to safely disconnect the negative cable followed by the positive cable before you remove the battery from its housing. 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. Rafts, Paddle
still blocked ? So would the advice be when normally running my engine and turning it off that I disconnect the fuel line and let it run out of petrol rather than switching the engine off? Remember to connect the positive first and the negative second. AN & Dock, Anchor Chains & Handles, Life Jackets & You must be logged in to reply to this topic. Once again, if you find damage, youll need to take it in for repairs. Please feel free to contact us or stop in today for all your outboard motor needs! Alternatively, if you find the level is above the H mark, you should remove excess oil with a syringe.Your last step involves the spark plugs. Parts, Wash Down The outlaw or pirate mindset is very liberating and free of stress. Hardware, Boat Seats by reset all the timing, spark advance and idle stops. But I don't understand how you would 'turn off the petrol' before the engine? Grills, Boat Drink Boats, Propeller Parts & If you cannot keep it running long enough to make an adjustment then open it one quarter turn and see if that improves things. Pumps, Marine Pump Replacement
Locks, Boat Deck You could try screwing the tank air vet screw down (light bulb moment - see below) but the engine may suck sir into the tank via an old filler cap seal. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. Bilge Pump, Tires, Rims, & Hub If you find any damage, youll need to remove it and bring it in for repair or possible replacement. Storage ha ha! Maintenance, Pumps and My 30hp had a few that were corroded really bad including the ground when I bought it. If anyone has any advice that might help I would really appreciate it. Yes still runs when problem starts. New In-Depth Outdoors TV episodes return this Fall, Sundays at 8 a.m. on the Fox Sports North channel! some super brilliant advice here so thanks very much.
How does it act at idle Does it stumble when to push the throttle? I did manage to foul a plug on mine from idling a bunch and it caused the motor to act up. Towers, Tow Ropes & Judging by your questions and the response to the answers and suggestions, I would say that your safest bet is to find someone who knows what they are doing, ask for their help and watch carefully, asking questions as you go. I'm fighting this monster harder than ever.
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. When they get old, cranky, worn, and hot, they start to short out. Winches, Boat Motor Supports & Nonetheless, this is the kind of help I need! In fact, it's just been a "cantankurous" SOB since I got it (probably the reason the previous owner sold it). If its a blocked jet do you think it is something you can teach yourself to fix or am I best calling a mechanic? Took the boat out for a couple hours today.
Maybe not your same problem but would not hurt to look. Waxes, Boat Cleaning If doing this adjustment in the driveway, Im not a fan of using garden hose muffs to make carb adjustments because the backpressure of having the lower unit underwater is not there when running on the garden hose.
If theres no damage, the next step is to remove any seaweed or other debris that might have become entangled in it. 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.
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