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Old 09-28-2009, 12:51 PM
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Sport_Pilot
 
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Default RE: Is it a phenomenon of these little 2-strokes that until well broken in, they will not turn a larger

A 10-4 is a much heavier prop than an 8-3. That engine will do about 15K on a 8-4. Still I suspect it will do better than 9K if you use a colder plug.