Vibration in RT40

[Wee Hooker]

Over the summer I bought a store sample Rip TIde 40# transom mount motor for a little over $100. The motor was unused but had a few minor 1/32" dings in the prop edge. When I went to use it the motor had a noticable vibration that causes the handle to shake back and forth a 1/4"-1/2" or so even at low speeds. I've pulled the prop off and filed the dings out but have to doubt if such small defects woudl cause this shake. ( Can't wet test as it's snowing up here!) I've also fired up the motor without th prop and their seems to be no runout of the shaft. Any suggestions/thoughts before I buy a new prop and hope this/ prop reinstall cures it?

p.s. Does anybody have a PDF IPB of how the prop fits? A washer fell out when I pulled the old prop and I'm not sure where it goes.

 

[Silvertip]

Re: Vibration in RT40

Pin through the shaft, slide the prop on so the pin nests in the notch, install the washer and nut.

 

[Wee Hooker]

Re: Vibration in RT40

That's what I was thinking but I'm prety sure the washer fell out of teh backside of the prop. Improper assembly or maybe somebody ahd it off??
In any case, I just put it back togeather without the flat washer( pin, prop then anode/nut). The anode is wider than the washer so should make better contact. Turned it on and the vibrations seems much reduced ( but still there to some degree). Of course I can't water test it but I think I'm in good/better shape now. Thanks.