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  1. John MD

    3.0L 140hp building

    I have all but decided to go ahead with a quick tear down of a replacement 3.0L 140HP inline 4 before installation. Been looking at the service manual and it so far seems pretty straight forward. Going to do it myself. Any pitfalls to watch out for on this motor? What parts need to be...
  2. John MD

    3.0 140hp compatibility/interchangeability

    Got a 88 OMC 3.0 140hp I/O Cobra. She has a cracked block and I am looking to replace the engine. I purchased what was advertised as a 80-90 model mercruiser 3.0. It was cheap and the engine is good...but once I ran the serial at home its a 73 or so. The leaded fuel sticker should have been...
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