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  1. 01-24-2017, 03:32 PM #1
    Knothead
    Knothead is offline Member
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    Mag II (XR4) lower unit size?

    I'm trying to buy a tool to remove the bearing carrier retaining nut & am confused about which part # I need....
    I'm thinking it's the one listed for 4" hub, meaning that the OD of the retaining nut is 4". Can somebody confirm that is the correct size, or maybe even know the part # for the correct tool?

    Thanks,
    David
    1992 Bullet 20XRD -- 1995 Mercury 2.5 225 ProMax, JC’s nose-cone lower unit, 26 pitch Trophy, 10" Rapid Jack, 85mph @ 1/2” above pad (still tweaking)
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  2. 01-24-2017, 04:32 PM #2
    W2F a V-King's Avatar
    W2F a V-King
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    Outside diameter of the retainer nut on a "standard" size V6 LU, is 4-3/8. Just measured a spare one I have for my stuff.

    Don't have an XR4 to measure. Thought they were 4-1/8" diameter of the cover nut.

    HTH

    James H.
    Last edited by W2F a V-King; 01-24-2017 at 07:01 PM.
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  4. 01-24-2017, 04:37 PM #3
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    racervboat
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    thought there were only 4-1/4 and 4 - 3/4 cases?
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  5. 01-24-2017, 07:00 PM #4
    W2F a V-King's Avatar
    W2F a V-King
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    Quote Originally Posted by racervboat View Post
    thought there were only 4-1/4 and 4 - 3/4 cases?
    Yes, but he was asking about the diameter if the cover nut. I only had a standard LU cover nut to measure.
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  6. 01-24-2017, 11:13 PM #5
    Knothead
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    I measured the XR4 cover nut & it is 4" OD, so I think I found the correct tool....part # 91-73688...
    Thanks for the replies!
    1992 Bullet 20XRD -- 1995 Mercury 2.5 225 ProMax, JC’s nose-cone lower unit, 26 pitch Trophy, 10" Rapid Jack, 85mph @ 1/2” above pad (still tweaking)
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« Different brand pistons in a rebuild? (2.4 200) | merc crank seal rings »

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