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Old Apr 06, 2012, 08:45 AM
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OS Gemini 120 II

Hey guys I have an old OS Gemini twin four stroke. It has been dependable over the years but I think it's slowly losing power and I think it's probably time for overhaul. Is there anywhere that we know of that can "overhaul" engines like this? I would love to send it to a trusted service center like Horizon but they don't work on OS engines. Ideas?
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Old Apr 06, 2012, 05:12 PM
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Great Planes is the importer for OS engines. You can contact them about it.
http://www.hobbyservices.com/index.html
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Old Apr 06, 2012, 09:32 PM
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Thanks! I'll give them a call Monday and see what they say. I have in mind for a qualified person to go through the motor and replace worn/damaged parts like o-rings etc. Basically a tune up.

I have the book and the adjustment kit but I'm terrified to touch a twin four stroke. Too many little pieces for this guy.
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