Lawnboy Commercial Mower - idle speed adjustment

Typical carburetor low speed circuit is blocked but can be fuel or other. Likely needs carb adjust, clean and/or rebuild.

Check, clean fuel filter. Check fuel pump for correct pressure, by opening and catching fuel in carbs. If carbs. are consistant with plenty fuel. You will need to clean carbs. Firtsly check for air leaks, by spraying carb cleaner on fuel lines from tank to carbs. If engine speeds up you found air leak

sounds like a blockage or water in the carby
clean out the main jets

PDF]PW80T Owner's Service Manual - Yamaha

www.yamaha-motor.com/.../lit-11626-18-30_108... Yamaha Motor Company1st Edition, April 2004. All rights reserved. ... GINNING RIDER. DO NOT REMOVETHESE ITEMS UNTIL THE ADULT SUPER- ... may leak out of the carburetor or fuel tank. 5. ... Removal of this plate adds to the ..... side of the engine on top of the crankcase. 1. .... Throttle Check for proper throttle cable operation 5, 12. Air filter ...

Yamaha PW 50 checking carb - YouTube

? 3:03
https://www.youtube.com/watch?v=M5Pe6YH6l3c
Apr 18, 2012 - Uploaded by fupabox
Checking out the slider,choke,and fuel flow on a 2002 Yamaha PW 50 ... Top comments ... the idle speed adjustment is either too low or the carb is gummed up...with it ... get full throtle and it just boggs any suggestions on what i shud do ... Yamaha PW 80- First Start in Years - Duration: 7:26. by Alex's Bikes ...

How to clean a pw carb - YouTube

ck. governor linkage connections

Excess air or not enough air. Replace air filter. Spray outside of carb to clean & ensure choke movement is smooth. Water in gas may cause this also. Flush out tank, refill with fresh gas, always use Stabile.

First I would start with the fuel filter, was that replaced too?, then I would make sure you have fresh gas and a new spark plug, Probably what I would suggest next is to pull your carb off and take apart and clean it with carb cleaner, most likely you will find dirt and possible small fragments from rotten fuel lines,partially plugging the inlet screen in carb, also your diaphram could be stretched, wouldn't hurt to pur carb kit in it while it is apart, I have just cleaned them before and been o.k. this should help you out

The unit is lean. rebuild the carb with a carb kit and check your fuel lines. If they are brown or discolored or brittle they need to be replaced. carb kits run approx. 11 - 18 dollars from your local dealer.

I would try and remove carb and clean it thuroughly. You can soak the parts in solvent or equivelant. The carb would be right after the air filter tube to the intake of engine.

Hi Dave, it sounds crazy, but try this. Check your gas cap. It could be clogged, causing a vacuum to occur in the tank, and therefore not allowing the carb. to take on gas. It usually take 10-15 min. for this to occur. The next time you run the mower and it starts to stall out, loosen the gas cap and see if it begins to run again. If it does, then you know that the gas cap is clogged.

Jim