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OS 81 FS

Old 10-01-2012, 02:59 PM
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Default OS 81 FS

What kind of tach readings are you guys getting on your .81's? I am seeing 8700-9200 on mine with a 13x6 threeblade. I can get 8700 on a regular basis.
Old 02-25-2020, 05:01 AM
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5% nitro, full synth
OS-F plug
14x6 APC
9200 rpm

Very smooth motor, usual quality OS carb.

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