Kohler XT675 engine oil fill threads bad

Oldawg

Forum Newbie
Toro 22" mower with Kohler XT675 engine. The oil fill cap is just the short plastic plug with the little dipstick. The original was cross-threaded and had ruined the plastic threads, so I ordered a new one. I had a hard time getting it started straight and when I did, it gets tight before reaching the gasket. The aluminum crankcase threads look ok, but something must be wrong with them. I've been working on small engines forever, so I don't think it's me. Anyone else having this problem?
 
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