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Old 06-20-2006 | 07:45 AM
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stevepurcell
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From: Stoughton, WI
Default Problem with OS 120 Engine with pump
I have an FS-120S III engine that I am having problems getting to run up to speed. Right now wide open with a 16x6 prop
I can get it to turn 8000 rpm. The engine is on a 90 size Funtana ARF. This engine is barely enough to keep the plane in the
air.

Does anyone have any suggestions or know of any place where they explain the pump system or any troubleshooting steps
I could try. It is tuned on the high end to max rpms.

Thanks

Steve
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