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When were they made?

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Old 04-19-2003 | 12:17 AM
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Default When were they made?

I just purchased a NIB Os 120 Four cycle engine . It is the FS 120
series, with two valve covers. I paid $200 for it complete with all wrenches , instructions and a new os radial motor mount. Any info on this engine would be greatly appreciated.
THANK YOU, WINGS NH.
Old 04-19-2003 | 01:03 AM
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Default When were they made?

1983

http://www.osengines.com/history/ostimeline10.html
Old 04-19-2003 | 02:11 AM
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Default When were they made?

Right On, they're a great engine! I'm certain OS went to the Surpass design due to machining costs. If they had revised the original design I'm sure it would exceed the Surpass in power.

The baffle screws out of the end of the muffler and if you can find someone to make up a straight pipe to replace it you will gain a good 300-400 RPM, then you will be par with Surpass. The thread pitch is from what I recall M11 x .75

Happy Fly'n....
Old 04-19-2003 | 07:29 AM
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Default Thank you

Thanks for the info on my engine.

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