Maintenance, Boat Cleaners & Maybe it's going into limp mode? I've owned it a few years, but have never been able to get a satisfactory idle. So stupid to make assumptions like that. You must log in or register to reply here. Seats, Pontoon Boat Seats & Savers, Boat Trailer Guides & Deals, Paint & Maintenance If you find any damage, youll need to remove it and bring it in for repair or possible replacement. Deals, Boat Seats Protection, Ladders, Steps, & You can adjust your cookie settings, otherwise we'll assume you're okay to continue. Video, GPS Chartplotters & Keep an eye on the thermostat. I have a 1989 20 LG with dual carbs. Bilge Pump, Tires, Rims, & Hub This is the video you need. Kits, Boat Trailer It may not display this or other websites correctly. Riptide Terrova 80 Trolling Motor w/i-Pilot & Bluetooth, Inflatable cylinder stroke yamaha hp head outboard freshwater 1992 mn Checked compression - 125 psi in one cylinder and 122 psi in the other. Does it continue to run after the problem shows up? Racks, Fish Finders, Sounders What should I be looking at in terms of fuel delivery? yamaha 90 outboard stroke hp manual 90hp service repair 2006 1996 engine manuals ec21 & Sonar, Trolling Parts, Boat Tubing & Canal World accepts no responsibility or liability for any user submitted content. Varnish, Marine Adhesives, For electric-starting models, youll want to check the main fuse to confirm its not blown. Could be Water in the Fuel?drain the Carburetor and check for Contamination.just a couple of drops can cause Erratic Running. 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. 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. Category, View What happens if you remove the air filter on top of the carburettor while it's running? It sounds like we have different setups - mine has only 1 carb (and no flat plate). and thanks cereal tiller, I will have a look at how to drain the carburetor. 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. yamaha hp stroke 25hp Storage Rails, Marine Tools & Tool No, I haven't checked compression - not exactly sure how to do that (buy a gauge and test it in the spark plug holes?). Downs, Couplers, Mounts, When its completely charged, reinstall the battery and cables. Someone just said to me that it was probably a fuel issue and I totally believed it without investigating myself! 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. Deals, Electronics yamaha hp powerhead stroke outboard remanufactured required core 2040 parts Accessories, Marine DC Power Plugs 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. GPS Chartplotter and Fish Finder Combo, Find I'm curious what oil ratio do you use? Running WOT is still perfect. AN What do you reckon though? If your primer bulb feels like it has air in it when it acts up, put a whole new line and bulb in. reset all the timing, spark advance and idle stops. Are all of the cdi connections clean? I have a 1989 20 LG with dual carbs. Kits, Seadog Stainless Steel Cup Wait a couple minutes the back to WOT then bog down. installed a new gasket. If theyre burned or cracked, you should replace them with the type of spark plug specified in your owners manual. Locks, Boat Deck One it is warm, it will accelerate from idle without bogging or stalling.

All, Anchor & All rights reserved. It's easy! Plumbing, Anchor But I noticed that if I left it idling in neutral, it would seem to gasp for fuel. Exactly what I was going to suggest. Financing, Iboats Good advice though. If its a blocked jet do you think it is something you can teach yourself to fix or am I best calling a mechanic? As has been said above, check that the cable is actually connected to something at the outboard end. Hardware, Boat How does it act at idle Does it stumble when to push the throttle? Bullet Skimmer, Paint and There aren't many folks on here with outboards, so you may not get many responses. But I will be spending a lot of today watching youtube videos to try to learn about this stuff. I have a 1997 Yamaha 25 HP (MSHV) outboard. I check it often now. ha ha! 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. 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. Accessories, Marine Electrical This helps enormously when you come to put it back together and you can't quite remember where that little spring came from and where it should go back! outboard flat gasket under the plate on top of bottom carb had deteriorated and half coverd the low speed flow. Products, Carbon Monoxide & Parts, Wash Down You have 4 threads now, yes the website still has some issues. Yes, but I would not bother for an overnight shut-down or for a day or two. 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. The black plastic center piece is all you need to work on. 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. 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. & Dock, Anchor Chains & Deals, Trailering Platforms, Slide There are plenty of videos online showing how to adjust an outboard carb. 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. So helpful it's not true!!!!! Professionals. Terminal DO NOT POKE WIRE, PINS OR ANYTHING ELSE INTO THE HOLES - YOU WILL DAMAGE AND PROBABLY ENLARGE THEM. Fasteners, Boat Windshield stroke 1993 yamaha 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. Acessories, Fish Cleaning If its a blocked jet do you think it is something you can teach yourself to fix or am I best calling a mechanic? Wipe the dipstick off with a clean cloth, reinsert it, then remove it and check the oil mark. The outlaw or pirate mindset is very liberating and free of stress. It's a part of the carb float bowl. Installed a new one and gasket. some super brilliant advice here so thanks very much.

Ski, Wakeboard & I have taken it out twice since then and the motor runs good so far thanks again. Handles, Life Jackets & If youve run 6-8 tanks this summer, Im not betting on bad gas. Any suggestions where to start? When youre done, reinstall each spark plug and place the caps back on. Biminis, View By lean, I am not talking about fule to oil, Im talking about fuel/air mixture at the carb. Always start with the easy, before you commence with dismantling complicated assemblies which you don't understand. 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. Covers, Boat Seat If not, you can proceed to charge it. Fuel issue? Does compression affect idle? Hardware, Boat Cabin outboard Galley, Covers and The idle jets in a carb are much smaller than the high speed one. The other day while cruising at medium revs it suddenly cut right down to low revs and slowed right down. We hope these tips for troubleshooting your Yamaha 4-Stroke Motor have come in handy. That happened to me last year. Sealant, &

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