I have a situation that has plagued me for almost 50 years. My family owned a Mark 78 and it was a
tremendous engine. We had it for four years and only had one problem with. It is this problem that I am hoping you can solve for me.
As I remember it, the Mark 78 did not have a shear pin. I think it had a slip clutch. Was that in the propeller or the propeller shaft?
One afternoon I hit a stump running about 8 - 10 mph. It didn't appear to do any damage to the prop or the lower unit. It still had its usual top end. The next week I went to start the motor and it was frozen. Naturally, I was accused of tearing up the lower unit.
I was never told what caused the motor to freeze. Could hitting an underwater obstruction cause the engine to
freeze?
I hope someone on this forum can help me finally put this mystery to bed.
Thanks,
tremendous engine. We had it for four years and only had one problem with. It is this problem that I am hoping you can solve for me.
As I remember it, the Mark 78 did not have a shear pin. I think it had a slip clutch. Was that in the propeller or the propeller shaft?
One afternoon I hit a stump running about 8 - 10 mph. It didn't appear to do any damage to the prop or the lower unit. It still had its usual top end. The next week I went to start the motor and it was frozen. Naturally, I was accused of tearing up the lower unit.
I was never told what caused the motor to freeze. Could hitting an underwater obstruction cause the engine to
freeze?
I hope someone on this forum can help me finally put this mystery to bed.
Thanks,