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  1. M

    1973 402 twin cyl. lower unit serial numbers

    I have a 40 hp twin with a bad lower unit. Looking for a replacement, as a rebiuld costs @ $600. I have been told that the lower unit that I have will fit a variety of H.P. motors. How can one tell from the seriar numbers witch one fits what ? Mine has serial number 1643-6037. The ones on ebay...
  2. M

    evinrude 75 hp middle cyl. comp. low

    Looking at buying a pair of 75 hp. evinrudes. A 92 & 93 model years, one running and one not due to running engine with no oil and loosing middle cyl. Second motor is off a set net skiff that was seeming to work fine. top 125 psi, middle 97 psi, and bottom 130. Plugs all seem to look the same...
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