Re: Help with 65′ Evinrude Fisherman 6HP

[fisherman6]

quote T.bell:

So if the spring inside breaks does it need to be replaced or is it even replaceable? What’s the purpose of the spring? Where did you find the brass prop drive pin a boat repair shop or online?

The spring inside is not available as a replacement. The entire shock absorber assembly would be replaced. I find many of them over the course of many years of use have become unreliable. In my opinion any used shock absorber for these motors is a bit of a crap shoot. If I am working on one of these motors and there is the slightest evidence of wear on the top of the shock or the bottom of the bearing carrier, that shock gets squeezed and welded. The drive pin gets replaced with brass to protect the gears, and the reliabilty problem becomes a non-issue.

The idea of the shock absorber is to be able to wind up if the prop hits a log or rock or something and take the shock load off the gearcase. Once the obstacle is cleared, the spring unwinds and you keep going. The problem is after this happens a number of times or hard enough they eventually spring or break. Then you end up with bigger problems. Once it is welded it effectively becomes a solid driveshaft with nothing to protect the gearcase from shock loading. That is the reason for going to a softer brass pin instead of the steel drive pin. If you hit something and shear the pin, you now have to replace the pin for the motor to push the boat again, but it saves the gears and it won’t destroy the bearing carrier like a bad shock. Just remember to carry a couple extra pins on the motor somewhere.

You can buy brass shear pins. I just buy a length of brass rod and cut them to length. It’s a lot less expensive and you can always make a few spares if you are somwhere you are shearing pins often.
-Ben

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