Removing the flywheel of a portable generator

Question

This is a portable generator:

I want to disassemble the flywheel by first removing that nut. I tried the method which involves trapping the piston at its top dead center and turning the nut clockwise. I couldn't do it. Maybe I didn't apply the force as sudden as the job required. Do you suggest any special tools? Would an electric or air wrench do the job?

Pᴀᴜʟsᴛᴇʀ2 · Accepted Answer

Assuming you wrote correctly, most nuts are removed counter-clockwise (or anti-clockwise if you prefer). You turn it clockwise to tighten it.
Be careful with how you've "trapped" your piston as it is fairly fragile. Don't use the flywheel itself as you'll break off the fan veins. If you break anything on it, it will require a new one because it would then be out of balance. If you can hold the crank from the other side of the engine, it would probably be a good way to go.

Removing the flywheel of a portable generator

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