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The Unicorn Engine

oh180 180004d

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    Proud to be Deplorable

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Posted January 03, 2015 - 03:27 PM

I had a fellow member ask for pictures of a recent acquisition. It seems that this engine is rather uncommon and that some of his acquaintances dont believe they really exist.

It is an OH180. Don't know it's whole history, just that it came to a friend in a Bobcat he owned. He ran it for several times and one day, the engine just wouldn't start. I believe the issue is with the carb as there is signs of water in the bowl.

He bought a new engine for the Bobcat, I bought his old one in a package deal.

It needs some carb work and I am concerned about the missing carb screw... but it looks to have been missing for quite a while and I've had it running several times. If damage was going to happen, it should've happened by now. I probably will pull the head, just to be cautious.

No idea where this will end up, but it's a great backup to have.

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#2 KennyP ONLINE  



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Posted January 03, 2015 - 03:30 PM

Cool looking little feller!

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#3 superaben OFFLINE  


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Posted January 03, 2015 - 03:47 PM

Can't have any skeptics now, can we?  :thumbs:


The OH180 is hard to find, you see a bunch of OH160's but hardly ever do you see an OH180. 


Ben W.

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#4 JDBrian OFFLINE  


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Posted January 03, 2015 - 04:36 PM

Does OH18 mean it's 18HP. That's a lot for a single!  Sort of like the rare Kohler K361. There was a time when the manufacturers seemed to want a big single to compete in the HP wars. A big 18HP single would probably drop right in where a 14 of the same manu. was mounted. This made it cheaper to up the power and compete with all the big manu. who started putting Kohler and Onan twins in GTs

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Posted January 03, 2015 - 07:08 PM

You suck!!  :poke:

I would love to get a hold of one of those. They do pop up here and there, but usually being parted due to a bad SSI or dropped valve seat. 

They were actually used in some 1978 Sears GT18, I got a buddy who had 2 of them. 

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#6 Canawler OFFLINE  



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Posted January 03, 2015 - 11:58 PM

Interesting... I always wondered how they powered unicorns. I just assumed it had something to do with rainbows.
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