Took flywheel wont start


New Member
Aug 7, 2008
On my ryobi 31cc I took the flywheel off to access the stronger mounting holes on the engine. When I put it back on it wont start now. I also took off the cylinder and cleaned it.

I made sure the gap was right and it has spark, I also made sure that everything is there and is working properly.

It just wont start, I think I got it to fire but just wont run.

Any advice would help.

Biker Mike

New Member
Mar 21, 2008
Cropwell Alabama
Did you check the flywheel sheer key? I'm not sure about a ryobi but on most engines there is a key that aligns the flywheel and crank to make fire at the proper time. A sheered key would give you spark but not crank as the spark is not in time with the piston. I hope this helps. Good luck.