Reply To: OMC-1956 30 hp motors -thrust washer on prop shaft question

[todd281]

I thought it was to keep the prop from jamming the shear pin after a prop strike, The prop can move on the rubber hub, if the prop strips the rubber hub it can spin and move, if it happens the prop can slide rearwards capturing the shear pin. In this situation you have to find a way to move the prop forward while still on the motor, enough to remove the pin. I read about this somewhere on the internet, and sure enough I found some of my props would not allow the washer, and on the same motor, some would. I assume this is because, the props that would not allow the washer had been damaged by a strike and moved. they still would fit and seemed to work without that washer.