Mnaufacturing Part Number: 3312199031 3312301037. Fits the following ZF boat transmission models: 25, 25A, 45A, 63, 63A, 63IV, 80A, 80IV, 85A, and 85IV. Not for use with any “M” models. Also fits Hurth HSW 250H, 250A, 450A, 630H, 630A, 630V, 800A, 800V, and 800A3.
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