Had a flywheel on an old outboard do the same thing as your Kohler. Maxed out my impact, whacked the puller HARD with a good hammer, and nothing. Heated it, still nothing. So - - I sprayed the b$$%^&d with PB Blaster and let it sit with tension on it. Every time I had a chance over the next couple of days I impacted and hit it again. Third day I came out to the shop after work and the flywheel and puller were sitting loose on the crank. It popped sometime during the night. Sooner or later it WILL come off.
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149, 2072, Original, 1772, 1782, #1 cart, Parker 48" sweeper,
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