Your voltage regulator: when you say it wouldn't fit, does that mean the plugs don't match? Smoke with electrical parts is always bad!!! Unless you mean the motor is smoking and that doesn't sound good either. And as far as the ad comment - I was referring to the new engine ad that you posted and it showed a standard splined shaft with male threads at the end.
Hammering anything on the output shaft sounds bad too! Live and learn! I hope your JB weld solution holds up.- Good luck.
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