Re: Mercrusier starter mounting bolt problem
- From: JR North <junkjasonrnorth@xxxxxxxxxxx>
- Date: Thu, 31 Jul 2008 13:45:17 -0700
Metallurgy can be defective sometimes. I used SS bolts on my Mercruiser starter-not likely to snap even if you reefed on the torque. Had a shock absorber once that snapped the upper stud a while after installation. Poor metallurgy. Your bolt failed at a stress riser point, right where the thread ends. This is right where a torque failure would occur.
JR
Larry W wrote:
Just a heads-up to anyone replacing a starter in an I/O Mercrusier.
I've replaced dozens of Mercrusier starters and I always use the best new starters available from the same supplier. I've never had a premature failure of the starter itself.
I replaced one in a 3.0 about a month ago and it was the first starter that came with new mounting bolts.
Customer called Sunday with a complaint that the starter was making a funny noise. Turns out the long mounting bolt had failed/sheared off (see link below). There was nothing unusual about the install and I know I didn't over tighten it.
Luckily, with the help of an angle drill, mirror and an ez-out, I was able to make everyone happy but I am going to rethink using supplied bolts.
http://www.rovatune.com/starterbolt.jpg
Larry
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