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HelicopterEngines Plugs Mufflers Fuel › OS 61 SF backplate thread size?
01-29-2017 03:43 PM  9 months agoPost 1
flyin dan

rrApprentice

Beloit Wi.

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OS SF .61 Blackhead, Does anyone know the size of the threaded hole in the back plate of these engines? Would like to put a pressure tap there for use with an older U-Pipe. Thanks.

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HelicopterEngines Plugs Mufflers Fuel › OS 61 SF backplate thread size?
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