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Old 05-02-2013, 13:14   #1
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Engine mounts replacement (preventive)

I was reading an article not too long ago in Oceannavigator where it was recommended that after 5-6 years old to consider replacing your engine mounts even if no obvious problems observed. Citing hardening of the rubber with then less absorption of vibration and secondary effect on drive-train, etc. Also was mention rubber-metal separation being non obvious before failure...

My boat is ten years old. It never occurred to me that I was due to replace theses at this stage!? I like to prevent rather than repair, and it is always easier to chose when and where to get theses parts, but this sounds to me a bit on the extreme and was wandering what is the common practice among cruisers regarding this issue.

Michel
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Old 06-02-2013, 11:12   #2
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Anybody with an opinion on this?
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Old 06-02-2013, 11:41   #3
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Re: Engine mounts replacement (preventive)

The lifespan of engine mounts can vary widely, depending on the type of mounts. The manufacturer probably has a recommendation for when to check and replace.

If your engine's jumping around, or there's pronounced vibrations, obviously the mounts are one thing to check. If you've got the prop shaft disconnected for some other service (eg change cutless bearing), that's a good opportunity to rock your engine to look for gaps or breaks in the mount. You can also lever the engine a bit (carefully) to check.

I 'apprenticed' a bit with a boat mechanic one spring, and I was surprised at the apparently short life and fragility of some mounts (-cough-Yanmar-cough-), especially considering the cost and effort to replace. We don't see car or truck engine-mounts failing as frequently. Is anyone aware of an aftermarket marine engine mount that performs AND lasts?
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Old 06-02-2013, 11:44   #4
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Re: Engine mounts replacement (preventive)

I think the common practice is to hear the "fwd-clunk... reverse-clunk" and then go find your source of noise.... We are a brilliant lot in other areas though!!!

-bump- help anyone?
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Old 07-02-2013, 18:23   #5
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Thanks for replies guys.
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