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  1. R

    Milky gear oil

    I just bought this 4.3L. My first boat, let alone I/O. I didn’t know the maintenance schedule on it. Cold weather is coming and I need to winterize it. So, I decided to change everything I could think of. Even though it looked good, I changed the gear oil by draining it, then pumped new...
  2. R

    4.3L horsepower

    I just bought a 2004 Larson 17.5' bowrider. It has a Mercruiser 4.3 LIter, Serial number 0M693427, with Thunderbolt V Ignition. Drive is Alpha One, Gen II (I think, sticker label is pretty rubbed), serial number 0M491238. This boat needs a new prop. I guess I need to know the horsepower to...
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