OS FS 90
11-17-2009, 09:41 AM
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OS FS 90
I bought a os fs 90 for 25 bucks, it had a broken bolt that holds the cam eccentric on. I fixed it and it runs great. Was this a good deal?
Also does anyone know what size prop and what horsepower this motor made? One last thing what years was this motor produced?
Also does anyone know what size prop and what horsepower this motor made? One last thing what years was this motor produced?
11-17-2009, 09:58 AM
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RE: OS FS 90
A "good deal" is whatever you think is a "good deal". If you're satisfied, then that's it.
We don't have power numbers anymore. The engine's been discontinued since the 1980's. We'd use a 13 x 8 propeller on it. You want it to turn about 9,000 RPM or so when leaned to just rich of peak RPM on the ground.
We don't have power numbers anymore. The engine's been discontinued since the 1980's. We'd use a 13 x 8 propeller on it. You want it to turn about 9,000 RPM or so when leaned to just rich of peak RPM on the ground.
12-02-2009, 12:14 PM
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RE: OS FS 90
I have two 90's that turn a APC 14X6 @ 10,000+ rpm on Byron 15% nitro, a little less on 10%. When heat cycled and run in properly they are very good engines!
