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    1 Wet Spark Plug

    My 1990 Mercruiser 3.0L is running ok, with the following symptoms: -missing about 200 RPM at WOT -idles a bit ruff, but not bad -occasionally will not crank over, can just keep trying to crank (on/off starter) until it cranks and fires right up -#4 Cylinder Spark Plug is wet with gas, 1, 2, and...
  2. W

    1990 Mercuriser 3.0 Tuning

    I had to pull the motor out due to a rotten board under the front engine mount, and a failed engine / driveshaft coupler. I installed a new coupler, new points, cap, rotor, wires, plugs, fuel filters, fuel lines, fuel pump gasket, valve cover gasket, carb and exhaust manifold gaskets, main...
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