flywheel nuts

[robin]

what is the best way to remove a flywheel nut and stop the engine turning over
?

[2or3wheels]

i hold the flywheel and loosen the nut, i am also beefy :) , actually not really just use a rag over the fins and grab as many as i can.

[crazycart]

an air impact wrench can get it done or what 2or3 said

[robertdjung]

i stick a screwdriver between the biggest fins and use a breaker bar.

[Russ2251]

I stuff a clean rag into combustion chamber via sparkplug hole to the point when piston compresses rag before TDC and then can safely wrench it off.
A large strap wrench can also be used around flywheel.
Briggs makes a couple of sizes of flywheel holders but may only work on their engines because of the way it grabs the fins.
http://www.cometkartsales.com/store/tools/images/newphotos/flywheelholder.jpg

[ironman]

ah.. impact tools always what great for me if you got them.

[Jblankster]

i just used a breaker bar and held the flywheel and gave the wrench a smack and it came loose. just like when you need to take the bolt off the snout of a crankshaft on a car :D