Troy-Bilt GTX20 Mower, Lawn and Garden Tractor Category
Original Model: Kohler Magnum M20S 49565
There is no exact complete replacement engine available for this. This has a 1-1/4" x 2-23/32" shaft, in which you can use a 1-1/8" x 3-25/32" shaft and cut it off to length or use a larger bushing to hold the clutch in place. 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 as well.
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Parts List
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General Disclaimer
While we may have sold many engines listed above to be used for a Troy-Bilt GTX20 Mower, Lawn and Garden Tractor Category, we are NOT claiming these are exact replacements unless the product notes explicitly say so. Many original equipment engines may no longer be in production because of obsolescence or EPA regulations, so in some cases there may not be an exact replacement available. Our intention here is to show that other customers have utilized these in the equipment shown, but may have had to make some modifications to do so. If we know of any required changes, we will list those, however, some adapting during installation should be expected.