Product DetailsNew ZF 3312199031 marine transmission oil filter. 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.
This is an OEM ZF filter and is a direct drop-in. ZF recommends replacing the oil filter every 300 hours or 1 year, whichever comes first, and to replace the oil filter after the first 25 hours of operation on a new transmission. The filter housing also has the part number 3312301037 stamped onto it.