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Old 11-07-2013
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Universal 5424 transmission

Hi all,
Looks like I have to replace the transmission on my O'Day 34 with the Universal 5424 and and Hurth 50 trannie. From what I have researched it appears the ZF 6 or 10 are the natural replacements, but I've been told that would involve moving the engine to accommodate the slightly longer ZFs. Are there alternatives that would not involve moving the engine? Has anyone had any experience with this?

Thanks
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Old 11-07-2013
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Re: Universal 5424 transmission

Is it a Hurth now? Is rebuilding a possibility?
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Re: Universal 5424 transmission

Yes, it is a Hurth on there now. It could be rebuilt, but that would cost as much as a new transmission, so I'd rather get a better new one if possible.
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Re: Universal 5424 transmission

If it could be reliably rebuilt and you avoid the hassle of cutting a shaft or getting a new one, redoing the coupling half, changing mounts, etc etc (alternatives to moving the engine itself)..you might want to give that some thought too...
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Re: Universal 5424 transmission

The new ZF6 is about $1200. The rebuild cost was closer to $1800-$2000. The ZF6 is something like 1.5" longer than the HBW5 that I had attached to our 5416. If you have enough room at the other end, it may be a matter of adjusting the engine mounts.

We were replacing the mounts anyway, so the extra length wasn't really a big deal for us. I didn't look into whether there was a "better" option.
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Re: Universal 5424 transmission

You probably will not like this suggestion, but; if I had to replace the Hurth 50 transmission on my O'day 35, I would probably bite the bullet and upgrade the Universal M25 motor and the trannie to a Beta Marine 25, or (maybe) a Beta 30. These are based on Kubota blocks, just like your Universal.

The problem with changing to a different transmission is that it will likely change the entire geometry of the prop shaft and the motor. As long as you gotta make a change, you may as well upgrade the entire system.

Another option may be to locate a used transmission. There are at least 2 available on eBay right now.
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Re: Universal 5424 transmission

Quote:
Originally Posted by finman7 View Post
Hi all,
Looks like I have to replace the transmission on my O'Day 34 with the Universal 5424 and and Hurth 50 trannie. From what I have researched it appears the ZF 6 or 10 are the natural replacements, but I've been told that would involve moving the engine to accommodate the slightly longer ZFs. Are there alternatives that would not involve moving the engine? Has anyone had any experience with this?

Thanks
There's a Hurth HBW50 on Ebay, rebuilt, for $1295.
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Old 11-08-2013
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Re: Universal 5424 transmission

Take a look at the Newage PRM transmissions. I put a new one on my Westerbeke. Beta also uses them on new engines.
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Re: Universal 5424 transmission

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Originally Posted by MarkSF View Post
There's a Hurth HBW50 on Ebay, rebuilt, for $1295.
as I said, there are two available on eBay; one (rebuilt) for $1295, and one (repainted) for $895.
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Re: Universal 5424 transmission

Personally I would say the logical choices are between :

Getting a rebuilt HBW 50

Getting a whole new Beta 25 as eherlily already suggested.

If this were a relatively new engine I would say you might benefit from the longer life of a brand new ZF transmission, vs. the rebuilt HBW50.

However, the reality is that the 5424 is limited in remaining life - partly by wear, but mostly by diminishing spares availability. Last time I bought a raw water pump for my 5424, it was $350 - and going up.

So extend your 5424's life in the most economic way possible, or bit the bullet and replace the whole drivetrain.
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