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#55472
green-thumbs
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    The part the impeller fits into is the water pump cartridge…several things to keep in mind
    1) cartridge is oriented (or clocked) to match water intake and outlet…
    2) cartridge is a friction fit in gear housing
    3) seal is on front or gear side of cartridge
    4) although the tool to remove cartridge probably worked when motor was new it is not unusual
    to find threads pulled out or corroded
    5) often the only way to remove water pump cartridge is to clamp prop shaft in vise
    and beat on the gear case so the prop shaft assembly and water pump cartridge
    come out together…messy and you have to protect prop shaft and be careful not
    to damage gear case. If you do this be careful to note position and orientation of
    shims seal ring rubber ring so you can put everything back where they belongs inside.
    Gear case can be source of frustration but like everything else with the right parts,
    the right touch and the right understanding all can be made right. Sometimes
    easier to go with a better lower unit as some parts a little up there.
    Louis
    .