Reply To: 1966 20HP Johnson

[Don]

I’m confused, I thought that torquing the original flywheel properly resulted in a no spark situation…
I’m with Cajun, don’t run the engine like this…The flywheel is damaged, along with the cam. The flywheel could come apart at high speeds, which will tear up the mag plate and crankshaft….

All that being said, this older 20hp idles real nicely. Please don’t expect your newer 20hp to idle this nicely, it’s more eco friendly recirculation system eliminated overboard crankcase drains.