Quote:
Originally Posted by greg737
It could be that it's related to an oil flow issue to that area of the engine, somehow this particular EX250 engine is leaving these gears slightly drier than normal (less oil clinging to them or not being pumped to them or not being properly drawn up between them). Oil clinging to gears definitely quiets/mutes them a bit.
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There isn't any oil pumped to the primary gears, they just sit where oil gets on them from the sump. Not that your post isn't good, I just didn't want B to think his oil pump may have a problem, just from hearing the gear whine.