Bolens GT2000 Duratrac Garden Tractor

Kohler Magnum M20S 49565

This has a 1 1/4" x 2 23/32" Shaft on it, in which you can use a Kohler Magnum with a 1 1/8" x 3 25/32" long shaft and cut it off to length or use a larger bushing to hold the clutch in place. There is no exact complete replacement engine available for this.

Additional Info

You will also need a bronze sleeve and keyway to go up to 1 1/4" diameter. You would need to use the muffler and shields from your original engine, the air cleaner assembly will be a little different, but should not affect anything. The wiring may be slightly different.