Shear pins

[ae708]

What ever happened to the shear pin? It used to be so easy to just replace a shear pin instead of ruining a prop and having to replace the whole prop. And MUCH cheaper.

 

[tommays]

Re: Shear pins

AE<br />as HP went so much higher and through the prop exaust became common it really did not fit into the new designs<br /><br />IMHP if i spin a hub at least i can limp slowley to a safe place if i shear a pin its over <br /><br />tommays

 

[ae708]

Re: Shear pins

Yeah but I always carried spare shear pins in the boat... cheaper than my spare prop that I have to carry now. I understand about the through-the-prop exhaust though. I dunno about spinning a hub. I ruined 3 props year before last when our water was so low on the lake. Bashed the props so badly that they would were so far out of balance that you wouldn't run them. Didn't bother the hub though...just had them fixed and ran them again without changing the hub.

 

[JB]

Re: Shear pins

Moving to Outboard Non-repair

 

[TOHATSU GURU]

Re: Shear pins

The change over began back in the late 60's due to safety concerns( read that as manufacturers insurance liability) about people trying to change broken shearpins while out boating. It's not that hard to break a pin, but you generally have to hit something to tear a hubbed prop loose. Less people in deep water fiddling around with their prop translates to less drownings/amputations. And as Tommays indicated, higher HP engines would not take to shearpins very well.

 

[Chris1956]

Re: Shear pins

My 1958 50 HP Johnson had a 5/16" stainless shearpin. This shearpin was too thick for the strength of the brass hub of the prop. If you hit something, the aluminum prop would bend and break without any damage to the shearpin.