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  1. K

    rebuild

    Trashed ny 150 a couple of weeks ago, to many RPM's, no 3 came out through the intake. Its a 75 Mercury and parts are getting hard to find. Found a new intake and crankshaft, honed all cyl,and evrything goes back together nice. Sit P/H back on boat, finally get motor fired back up, notice that...
  2. K

    exhaust extension

    I have a 75 Merc 150, and have been told that an extension will increase H/P.
  3. K

    not burning gas

    recently destroyed my 150 Merc, no# 3 came out through the intake, and cooked the top of the piston, had to replace crank shaft. Have it back together, but not running right, when I pull the plug wires to no# 5 and 6 the RPM's go crazy, and when I pull the plug's they are gas soaked, have raw...
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