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Recent content by '79 MAKO INBOARD

  1. 7

    Marine Power 5.7 not hitting RPMs

    I've got a '79 23' Mako with a '99 Marine Power 350 Vortec. It's new to me, and runs great except I can't hit max RPMs, supposed to be 4400-4600. Max right now is 26kt @ 3500. That's with me and my 160lb 17 year old son, half tanks of fuel, say 40 gallons total. I'm only a few pounds heavier...
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