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    Swapping power head units or midsection lower units or swivel transom mounts between Mercury 83 50 HP 4 cylinder and 93 40 HP

    So I have a 1983 Mercury 50 HP 4 cylinder outboard, but I have just about decided that I really want an outboard with BIA transom bolt pattern and power tilt and trim that mounts between the BIA transom mounts to be fully compatible with a hydraulic jack plate I have. Next I found a guy with a...
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    Transom bolt pattern for older (1983) 50HP 4 cyl Mercury with power tilt and trim

    I know the newer Mercury outboards use the standard BIA pattern, but I am not sure what the older pattern is-- and in particular the pattern needed for the separate power tilt and trim. The older mount has four mounting holes in a line that look to be narrower than the standard BIA pattern. I...
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