My 5239 has a small crack in the area of the key way seat on the top of the flywheel. Would this cause any problems? I have had the same problem with a 16.5 hp B&S that permetted the flywheel to wobble as it could not be tightened down to required torque. Required a new flywheel to rectify the problem$$$$$$$ Would this be a problem with my 5239? Perhaps this is why the flywheel began to rub against the legs of the coil.
One thing that I have learned from cracked key way seats is that some people over torque the flywheel nut by using an inpact wrench to tighten the nut!
Tia,
Franchi
#2
ILENGINE
Cracked key way will effect timing like you said, because you cannot properly torque the flywheel. I have seen cracks in flywheels when people would substitute the aluminum now magnesium, with a steel key and then hit a solid object with a pushmower.
#3
reynoldston
Not a thing to mess with. Install a new or used flywheel. You are spinning this thing over 3000 RPM and if it comes apart you will do a lot more damage if not also to yourself. Anything that spins like the blade or flywheel don't take changes if it is cracked!!!!!!
#4
Two-Stroke
You can probably find a good used flywheel on eBay.
