Reply To: 1947 Mercury KE4 lower unit

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April 9, 2019 at 12:01 am #172908
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    Seal catalog will indicate in BOLD numbers the standard general purpose seal for each
    shaft size and seal diameter and height. Unless the application requires a nonstandard seal
    go with the common least expensive seal.

    The new seal will work if the shaft is smooth, round and concentric to seal lip.

    5569 is for a .999 bore and is .219 high
    26 – 20590 is Mercury part # for oil seal for water pump