Yamaha F115 cuts out at idle or low R.P.M.

Cuts off at idlle or low rpms, doesnt do it all the time, just sometimes. Have replaced the primer bulb, racor, and lines going to engine. Cannot make out year from the plate. Didnt start doing it untill after I did an oil change, Put in new plugs, the sticker on engine called for o6 and they were running o5s (or is it the other way around?) Thought that may have been the problem but same symptoms after changing them back to the origional, (wrong) ones. We also removed the rear oil pan in order to repair a hole that was apparently made when the former owner tried to remove one of the screws holding the spark plug cover on. We made sure to line up the arrows before removing the Crank gear and belt. The guy who was helping me says that when he removed the main gear on the top it was two teeth off from being lined up, but when he replaced it he lined it up to the arrows. My question is this, Is it possible that it is supposed to be two teeth off the mark? I called a Mechanic and he says its impossible that it ran like that, if you all concur, I guess I will go after the vrs.? I did run it once without the racor rite before the oil change.... Thanks1

Much more comfortable with Cummins or Cat.

Dave

Re: Yamaha F115 cuts out at idle or low R.P.M.

To set timing on this engine line the two arrows up with each other on the camshaft gears then locate the keyway on the crankshaft and point it straight back towards the middle of the two camshaft gears. then put your belt and tensioner on, adjust your tensioner and rotate the engine by hand and check everything. Dont try to line up the flywheel marks with anything, use the keyway.

Re: Yamaha F115 cuts out at idle or low R.P.M.

Pat, Awesome! Thats what Im talkin about! I will do that first thing in the morning, In your opinion, do you think it would run being slightly off timing? I was told if it wasnt exactly rite it would not run at all. When I turn it by hand, what am I checking for? Oh, THANKS!

Re: Yamaha F115 cuts out at idle or low R.P.M.

Thanks a ton Pat, made tthe adjustment and its running like a top now, many thanks!

Re: Yamaha F115 cuts out at idle or low R.P.M.

Glad i could help.