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Recent content by charlesj314

  1. C

    High altitude tuning/jets/prop

    Hello boaters! I'm new to forum use, and I apologize if I've repeated a question here. I have a '77 Evinrude 140hp, s/n# 140743s. I live in Montana and have several lakes at various elevation to enjoy. My boat primarily operates on about 7000ft at Hebgen lake near West Yellowstone. I have the...
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