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    1977 Mercury 1500 lower unit swap

    Ok have it running good except at WOT only get 4600, last year was getting 5800. Only difference is the lower unit is from a 1972 1150, which may have a different gear ratio (maybe)??? Pretty sure lower unit I was running last year had a 2.1 and I think this one may have 1.78. Would that be the...
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    My 1977 Intruder Aquarius rotten deck

    Re: My 1977 Intruder Aquarius rotten deck Would you be able to post some pics of the inside of the hull? Also did you see these pics of the logo? Thanks.
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    1977 Invader Aquarius logo

    Re: 1977 Invader Aquarius logo See if these help.
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    1977 Invader Aquarius logo

    Re: 1977 Invader Aquarius logo Ok not the best, but here is view of aft seats. I will get better pics next week. Also will post logo pics later today. Is this close to what yours looks like?
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    1971 Mercury 650 Lower Unit Inspection

    I picked up a 1971 Merc 650 for cheap ($125) the lower unit had "something" happen in it, that's what P/O said (didn't hit anything he thought). The case in cracked near the back. I would like to pull the parts out, what should I look for as far what could be damaged/broken? I was able to pull...
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    Lower unit interchange.

    Will a lower unit from a 1968 100hp inline 6 work with a 1971 65 HP 4cyl? I know the gear ratio may be different. If not then where do I find what lower unit will work, besides one from a 1971 65 HP? Thanks,
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    1971 650 4 cyl powerhead swap with a 500

    Can I swap a 1974 merc 500 4cyl powerhead with a 1971 650? Just asking.
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    Mercury Powerhead Swap

    If I swap a Mercury 1973 1500 powerhead with one from a 1977 which years specs should I use? According to the manual I have the only difference is in the timing 1973 has 6 btdc for the throttle pickup - primary, 1977 has 1-3 btdc. Or does this statement cover this? " All of them are speced...
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    1974 Mecr 500 50HP Impeller and gasket

    When I go to set the impeller I noticed that it makes contact with the face plate to pump cover gasket and not the metal of the face plate. I am using this kit "SIERRA 18-3507 Water Pump Kit" Contact is made toward the front of the plate, maybe the wrong gasket in the kit? It lines up with the...
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    1970s Mercury power trim with 3 button panel

    Confused. Ok cant seem to find the answer so I will ask this. Does the UP (top) button on the 3 button panel supposed to do anything? If I press both the middle and up button the motor runs. If I press the IN button (bottom one) the motor runs in the opposite direction. If I only press...
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    Looking for parts for 1973 1500

    Looking for the shim that goes under the water pump base. I think this is the part number 15-30278a1. Looking for a place online to buy.
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    1973 1500 Lower Unit Questions

    Has anyone around here that might have replaced or done any work on the water pump? I have a few questions about the reassembly. I have the manual but not 100% clear about this. Thanks.
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    Mercury 1500 150HP inline 6

    Serial number is 3751999, what year is this? Has power trim with it.
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