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    Oil drain hose kit thread size and pitch

    Mine is 88-90 and the only options I’m seeing on overtons is 12mmx1.75, 14mmx1.5, & 3/8x18
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    Oil drain hose kit thread size and pitch

    I have a early 90s mercruiser 5.7L and would like to install an oil drain hose kit but they offer 3 different thread sized and pitch. The part # of my oil drain bolt is 49956. Would anyone know the size and pitch off hand? Thanks
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