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Novarossi 91CR for Planes - Running-In (Breaking-In) the engine

Question:  Hello, your instructions included in the 91CR engine mention  4.RUNNING-IN       b) Plane -Fix engine on plane or test bench with propeller, run engine at low rpm at least 30 minutes??       How low rpm, 2000,5000,8000? I don't know what low rpm is to you. Please give use a approximate number.         For a 10 lb. airplane what size...

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