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    How many drain plugs in GM 4 cyl?

    With -6 degrees expected in a few days, I drained the water out of my 1980?GM 4 cylinder 140 hp. I have no manual with this newly acquired boat so I'm working by sight and feel. So far I have only found 2 water drain plugs. One under the intake/exhaust manifold and one near the bottom of the...
  2. S

    1990 90hp merc floods cyl #3

    Great forum! Hope you guys can help me. I replaced my 65 hp merc with a 1990 90hp that has little useage. It ran perfect for about 8 tanks of gas. Yesterday it just sputtered once when running out of fuel and I switched tanks. When I re-started it, it ran a little rough and when I opened it up...
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