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  1. #1
    JFizzleJR's Avatar
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    Cracked GPR Thru-hull fitting

    The plastic thru-hull piece on the inside of hull where the driveshafts meet with the rubber coupler on one of my GPR hulls is cracked. Any idea how to fix it without replacing it (the tunnel is already re-inforced)? I assume it's made from plastic, but maybe it's really SMC? Use marine-tex? Fiberglass? What are my options. Thanks in advance for any insight.


  2. #2
    JFizzleJR's Avatar
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    Here's a pic. You can see a triangle looking piece missing and two cracks across the top.
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  3. #3
    mrbtd's Avatar
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    I would use CF and West systems expoy. Its going to be tough to get the hose back on that side though.

  4. #4
    JFizzleJR's Avatar
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    If I build up the outer diameter a reducer coupler should work instead ?

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    mrbtd's Avatar
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    How about some stainless pipe with the right ID then put it on both sides. Obviously would need a larger ID hose but should work.

  6. #6
    WATER WOODY's Avatar
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    The 'ID' of the nipple,were the shaft goes through,is 1.18...ok,the drive shaft is .775...over all difference is .404,cut that in half is .200 roughly 3/16" clearence all the way around when the shaft is in..I work with poly pipe,they have 1" stainless stiffners for compression fittings.This might work on the ID of the nipple,in other words,slip inside the hole.Use some 5200 3M to secure it.I will look into it.This way your OD will not change and you can still use the 1 1/2 hose.

  7. #7
    JFizzleJR's Avatar
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    Thanks for the idea mrbtd and thank you Kevin for taking all the measurements and offering your input.

  8. #8
    WATER WOODY's Avatar
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    Cool fizzle,let us know how it goes.

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