Reply To: 1966 20HP Johnson

[cajuncook1]

Two things that come to mind that could have caused points cam to crack.

– the points cam was not completely seated prior to tightening/torquing the flywheel. The key may be damaged or malaligned preventing the points cam from properly seating and as the flywheel was being tightened it pushed the cam down and cracked it in the process.

– In the past the flywheel may have been over tightened/torqued and slightly mushroomed the flywheel mating surface. This would cause the flywheel to press on the points cam and crack it.

Regardless the issue, please inspect the above possible issues, so the replacement points cam is not cracked as well.

Cheers,
Cajun