Prop Slip

[southy]

at low speed the prop is fine however when i increase power the prop seems to slip, similar symptoms to a clutch slipping in a car, its on a 1979, 55hp johnson, no pin in prop, spline is in good shape no appearance of wearing or fatique, gear oil was ok no metal fillings, Help Pease Help

 

[Okee Jimmy]

Re: Prop Slip

Your prop is probably spun out. There is a rubber bushing between the prop, and prop hub. This absorbs shocks when your motor is put into gear. Occasionally they will spin inside the prop, and once this happens, they will need to be re-hubbed. If you remove the prop, do you see spiral wear rings on the thrust washer, and prop/ prop hub? If this is not clearly apparent, a magic marker can be used to draw a line between the prop/ prop hub, reinstall the prop, and run the motor remove the prop and see if the lines are gone, or don't line up. this would indicate a spun hub.

Hope this helps, Jimmy

 

[tashasdaddy]

Re: Prop Slip

no need to remove to test, Ezeke found another way, just mark each end of the cotter key, then test. if it is spun they will not be line up.

 

[phipps]

Re: Prop Slip

The lower picture will not enlarge when clicked on. Could you post a larger pic? I need to check my prop and that method looks easier than pulling the prop.