Mercury KD4

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  • dave-bernard

    US Member - 1 Year (includes $3 online payment fee)
    Replies: 2014
    Topics: 30
    #229161

    second hole is for the shear pin and prop without he clutch hub. just the prop look in the prop and you will see the cut out for the shear pin.


    billw

    US Member - 2 Years
    Replies: 2071
    Topics: 66
    #229190

    The clutch gets driven by the same pin that drives the impeller. The second hole in the shaft, seen in your picture, is not used when there is a clutch. That hole would be for a shear pin to drive on the propeller directly, with no clutch.

    Long live American manufacturing!


    fifty20ne

    US Member - 1 Year (includes $3 online payment fee)
    Replies: 488
    Topics: 75
    #229196

    Chart14-1

    Chart8

    • This reply was modified 3 years, 1 month ago by fifty20ne.
    • This reply was modified 3 years, 1 month ago by fifty20ne.
    • This reply was modified 3 years, 1 month ago by fifty20ne.

    Boonie

    Canada Member - 1 Year (includes $3 online payment fee)
    Replies: 203
    Topics: 28
    #229199

    Yup thanks. All makes sense now. Now I’m looking to replace the seal in the pump housing. How in the heck does one get that out?


    dave-bernard

    US Member - 1 Year (includes $3 online payment fee)
    Replies: 2014
    Topics: 30
    #229200

    Bill the clutch is not driven by the impeller pin the 2 holes are outside the pump.. one for the clutch and one for prop without clutch as I have said ..


    Boonie

    Canada Member - 1 Year (includes $3 online payment fee)
    Replies: 203
    Topics: 28
    #229244

    Any tips on seal removal?


    dave-bernard

    US Member - 1 Year (includes $3 online payment fee)
    Replies: 2014
    Topics: 30
    #229247

    tap it out from behind with a hammer and screwdriver.


    Boonie

    Canada Member - 1 Year (includes $3 online payment fee)
    Replies: 203
    Topics: 28
    #229248

    And if you can’t get on it from the back? Brass bushing in the way.


    green-thumbs

    US Member - 2 Years
    Replies: 583
    Topics: 43
    #229269

    Removing the old seal is not a neat and tidy affair for me. I use hammer and punch to beat in the rim of seal so I can grab on it with nippers and bite off pieces. There probably is a neat and clean method other have discovered, but. not shared. Not a difficult job, just time consuming.
    The real problem is that the old hard seal has worn a groove in the prop
    shaft so a new seal will not work or last.
    Louis
    It seems to me the lower unit illustration is for later type lower unit
    not KD4 type.


    kirkp


    Replies: 240
    Topics: 16
    #229293

    lower-unit

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