Re: Johnson QD Prop Hub

[frankr]

quote Mumbles:

Your QD does have a rubber hub and it’s easy enough to check it’s condition.

Just remove the prop and mark the hub and prop with a felt marker on the front of the prop and reinstall. After running the motor again, remove the prop and look at the marks. If they are out of line, the hub has been slipping.

Exactly. But you don’t even have to remove the prop to mark it. Use the cotter pin in the prop nut as one mark and mark the prop aligned with the pin. If it slips. the shaft/nut/cotter pin will spin inside the prop and marks will no longer align.

It’s a pretty safe bet that is the trouble.