Originally Posted by
Nitro Tiger
I have the Go GX11-5RHO, done about 3ltrs of fuel and since new it seems to leak fuel behind the flywheel, every time I pull the motor out there's wet dirt behind the flywheel on the block.
Any sugestions as to what might cause this leak, also since new its been a bit temperamental to tune, I thinking this leak has something to do with the tuning issues. Is there any problem that can occur tighting down the flywheel, a guy that knows alot about Go engines mention when tighting down the flywheel to take out the freeplay when pushing on the flywheel collar.
Any help appreciated.
If your having tuning issues replace the front bearing. As the guys have said, this is most likely your problem.
With the collett, it should pull the crank up tight against the main bearing as you tighten the clutch nut, but it is good practice to remove the back plate and actually push the crank and hold it against the main bearing while you push on the collet and nip it up. This alleviates any chance of crankshaft movement, and the con rod scraping on the back plate during operation.