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Old 24-01-2013, 00:30   #46
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Re: Hard vs Soft Engine Mounts

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Originally Posted by stillbuilding View Post
This discussion has me thinking I will revert to hard mounting my Perkins and avoid the costs of soft mounting and flexible drive train. Steel boat but I think 6 cylinders may not be too bad.

Anyone with hard mounts care to comment on 6 cyl or Perkins specifically.
cant comment on perkins per se, but if you are designing, one thing i think might be worth mentioning is the distance between g.box mount and fwd stern gland - on my boat more than a metre, and the stern tube is pretty long too - i'm just suggesting it might be worth thinking about or discussing with someone with experience in hard mounted engine systems. I would say in relation to a 6 cyl engine - properly tuned it has to be a lot smoother than a 30 year old 2 cyl., but even my old 2 cyl only produces negligible vibrations - and that in a fibreglass hull too.
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Old 27-01-2013, 06:07   #47
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Re: Hard vs Soft Engine Mounts

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Originally Posted by Jim Cate View Post
I am curious how you measured your alignment to that degree of accuracy... .001 mm is one micron, and that is a pretty thin feeler gage!

Cheers,

Jim
I borrowed a laser alignment tool for aligning ships engines from work.
Typo I meant 0.01mm the laser can go slightly more accurate but it gets difficult.
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