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Old 30-04-2015, 14:25   #1
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Universal 25 and Hurth 50

My universal is running great, however the hurth 50 is shot. I was told its cheaper to buy reman than have a shop rebuild it. I was looking at the zf12m as a replacement. Any suggestions? Looking for something that will bolt up with the least amount of modification. Or is there another model I should be looking at? Its on a mid 80's Catalina 30'.

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Old 30-04-2015, 14:38   #2
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Location: Cowichan Bay, BC (Maple Bay Marina)
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Re: Universal 25 and Hurth 50

The C30 yahoo group might help you out. The C36 skippers have had remarkably numerous transmission issues, but usually on the later engines.

The C310 group with M25XPAs have also had issues. - Home, find their tab under the Forum tab, upper left.

We simply haven't had those issues, but feel free to look around our C34 tech wiki: Engines 101 - The BIGGEST & BEST collection of M25 Series Universal Engine Information on the Internet, plus some M35, too

Diesel Engine - C34

The key seems to be, in a rebuild, the type of replacement clutch material you get.

The larger ZF10 fits, IIRC.

Good luck.
Stu Jackson
Catalina 34 #224 (1986) C34IA Secretary
Cowichan Bay, BC, (Maple Bay Marina) SR/FK, M25, Rocna 10 (22#) (NZ model)
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