Re: 9.9 evinrude 1978
You might of spun your prop. My 66' did that, ya ever accidentally tried to go in gear with the prop in the sand or muck? Even though your shear pin visually looks good, check the rubber bushing that goes between the inner and outer prop assy. There might be evidence of little rubber dingle-berries there. It's kinda hard to tell cause the water lubes it.