Reply To: Cam Won’t stay in position 1956 Johnson 10 hp QD-17B

[Mumbles]

You can use the timing tool if you finger tighten the flywheel nut on it to hold it in place. Using the tool along with an ohmmeter sets the timing more accurately than a feeler gauge can. Removing the spark plugs first will help in turning the motor over.

The spring has to have some oomph behind it as it’s holding the carbon seal against the upper crank bearing. You don’t want any crankcase pressure leaking out here or the points will be contaminated with oil in no time.