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Author Topic:   Sheer pin?
sport15er posted 07-07-2000 08:53 AM ET (US)   Profile for sport15er   Send Email to sport15er  
A friend asked whether or not I had a sheer pin on my prop... I'm not sure. The motor is a '87 60hp Evinrude, original motor on my 15'
Super Sport. Anyone have a clue whether it was a standard feature; or can it be added?
Clark Roberts posted 07-07-2000 09:36 AM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
Sport, your engine does not have a sheer-pin nor does it need one.. you prop is splined to the prop shaft and the protection for the prop and the engine (shaft and crank) is via a high compression rubber hub separating the spline hub from the prop body. Impact is absorbed by this rubber insert and if severe, slippage will occur to make protection complete... with age and of course hard use, this rubber hub can wear out and replacement(rehubbing..sp?) is necessary... when worn out, the prop blades will slip partially or completely (like a sheered pin) ... knowed around these parts as "spinning a hub". The days of sheer pins are limited to very small, like some 1-3hp, outboards... Happy Whalin... PS> you should remove that prop (if it's not already frozen to prop shaft) and inspect it and grease up the spline! Carrying a spare prop is a good idea, but if the old prop can't be removed well,,,,, etc.. etc...etc.... Clark.. Spruce Creek Navy
sport15er posted 07-07-2000 10:00 AM ET (US)     Profile for sport15er  Send Email to sport15er     
Thnx Clark, I had heard of the rubber hub as the other protection, I think I will pull the prop later on and chk it out. What do you think of the composite props, for a spare? My current prop is stainless; and I can't see it easily breaking without hitting something cruising at full force; bending maybe, but not breaking.... whadaya think?
Clark Roberts posted 07-07-2000 01:36 PM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
15'er, any spare prop is better than none! A composite would do the trick and so would a good used aluminum (of correct pitch)... important also is to have the necessary tools, and a piece of wood (to chock the prop blades so you can remove the nut) aboard! Won't do you much good if the spare and the tools are hanging on the garage wall!
Happy Whalin.. the old man

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