So I came across a first in my limited experiences yesterday. My buddy blew up his ring gear on his snow blower, which required pulling the flywheel to swap out. After cursing it for 20 minutes, I realized that is was a standard thread (righty tighty.) So I cursed myself, and finished the job with relative ease. Come to think of it, I have only ever pulled flywheels from saws and other 2-strokes, and everything has been reverse thread. Is this a 4-stroke thing, engine mount orientation, or just a "ya gotta know" thing? btw the ring gear shrapnelled because the electric starter was loose, making it engage kind of cocked. I was able to save his starter with some JB weld (love that stuff.)
The chainsaw flywheels I've pulled have been regular RHT. The flywheel crank spins CCW, so CW nut ON keeps it tight. Now, the clutch is always LHT with clutch spinning CW. And it's a REAL GOOD idea to tighten clutch AND put bar, chain, clutch cover, bar nuts on before the test run. Or you'll be like me running down the driveway after a 40 mph clutch, sprocket and washers yelling "Where da parts???? Where da parts????"
I don't wrench on chainsaws often. But on two strokes like sleds crank bolts are standard. The motors also spin in both directions for reverse. Other small engines and cars are also std. The press fit or keyway usually keeps them from spinning.
