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    Mercrusier sterndrive ratio question

    This is the info on my purchase. Up for sale is this Mercruiser Pre Alpha Stern Drive lower unit 1623-5412 . This unit is in good working condition and good cosmetic condition. It came off a 1981 Dixie Boat Works boat that spent its life in fresh water at Lake Norman NC. Some minor paint...
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    Mercrusier sterndrive ratio question

    This is what i bought https://www.ebay.com/itm/Mercruiser-Lower-Unit-Pre-Alpha-1623-5412-Fresh-Water-Unit-Dog-Leg-Stern-Drive/254775886682?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 pics are of mine.
  3. C

    Mercrusier sterndrive ratio question

    That is a nice chart thanks I looked at the number in my bottom and it is the same number as the one I'm looking at 1623 5412
  4. C

    Mercrusier sterndrive ratio question

    Hi all I have what is probably a MC-1 out drive that probably has a 1.65 ratio. I want to buy a used lower gear unit but the one I'm looking at has a 1.50 can I use it? Mine is a 1977 mated with a straight six GM 165 hp the new one is stamped 1623-5412 and came out of a 1981 Dixie Boat Works...
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    Plugs plugs and wires

    Thanks Chris I will try Sierra is a 165 hp a 4.0 L engine?
  6. C

    Plugs plugs and wires

    Hi All What plugs, wires, cap, rotor and condenser do i need for a 1977 GM 250 cu in, inline 6 cyl 165 hp mercuriser do I need to buy? Would it be the same parts for the car engine that has been modifies?
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