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  1. J

    fuel screen

    Mercruiser 120 bogs when throttle is opened up. I have read about a screen that could be clogged which restricts the flow of fuel to the carburetor. The engine idles perfectly but bogs severely. Just rebuilt the carburetor and replaced all electronics and fuel filters. I didn't look into the...
  2. J

    electronic ignition recommendation

    I have a 1978 four cylinder mercruiser/GM 120 with the standard points and condenser ignition. Everyone I have talked to has recommended switching over to an electronic ignition. Is this advisable and if so, what brand/model would fit my motor and what all is necessary to make the conversion?
  3. J

    Pinhole in float

    After rebuilding my Rochester carburetor I installed it back on the motor and started it up. The carburetor was flooding profusely. I pulled the float out of the carb, shook it and heard gas inside of it. I scratched a little discolored area on the float and the fuel from inside started seeping...
  4. J

    sputtering motor, water in fuel?

    I have a 17' Four Winns with a 120 Mercruiser I/O. When I run the water muffs on it in the yard it runs fine but after I put the boat in the water it didn't want to run. It idles but would bog down after trying to accelerate then sounded like it was running on only three cylinders then back to...
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