I adjusted the valves on this engine. When I cranked the engine over without the valve cover on (to check that valves were working right) it seems like there is way too much oil coming out of the push rod galley. How much should there be?
I adjusted the valves initially because I rebuilt the carb and it seemed to be spitting out fuel into the breather and backfired a few times.
It is a 31C707 0603 B2.
It is a splash lube engine, so don't worry about the oil splashing into the valve cover. The oil will drain back into the crankcase just as fast as it is splashed into the cover.
Ok thanks. I guess since the valves weren't bad out of adjustment then I need to check the flywheel key.
The governor being out of adjustment won't cause backfire will it?
#4
EngineMan
Look at the flywheel key first, and then come back.:licking:
Are you sure the valve clearance is set right? Ussually it is about .006 valve clearance for each valve. Have you checked to oil level? Too much oil could cause your problem.
I have the valve clearance set at .005 and oil level is good. No oil on air filter just gas.
Inlet valve?? You are talking about the intake valve right? Just making sure I am checking right stuff. I will do a compression test and let you know the results. I know the valves are opening and closing. But they may not be seating properly.
I thought initially that it was just the Nikki carb causing my problem. But then I swapped it with a walbro and it still does the same thing. It will run good and smooth if I start out at low throttle and slowly work up to full throttle. But if I go too fast or try to engage PTO or even lower the throttle too fast it will start surging and spitting gas then back firing.
From what I can see from the photo, inlet (intake) valve is not seating right, if you have a valve grinding set I would redo the valve(s) if the intake valve is not closed on compression it will blow fuel out of the carb.
