Question about shear/drive pins

[F_R]

Re: Question about shear/drive pins

You can still do that if you enjoy hanging over the rear of the boat, with the waves slopping over the transom to change a shear pin. If you are lucky, you won't fall overboard. Personally. I like the drive pins better. And of course there were the Martin Motors that had a release to swing the lower unit around into the boat to change the pin. Yep, I'm old enough to remember.

 

[Craig-]

Re: Question about shear/drive pins

The proper pin for that motor is a 1/4" diameter Stainless Steel DRIVE PIN. It is not a "shear pin", and is not intended to shear. The rubber hub in the propeller is supposed to absorb the shock of hitting rocks and stuff. It sure looks like you hit a few. Although not intended it is possible to shear the stainless drive pin. But you would have to clobber something might hard before that would happen.

A cotter pin would shear off almost immediatly.

The drive pin holds the prop. The nut holds the drive pin. The cotter pin holds the nut.

That prop looks in better shape than the one he is putting back on.

 

[boobie]

Re: Question about shear/drive pins

Yep...FR I remember those old Martin Motors too. That mtr was way ahead of it's time.