Fuel water detector for Penta D3, D4, and D6 diesel engines.Mounts in the bottom of the fuel filter.Detects water in the fuel system.Compatible with Penta models D3, D4, and D6.Replaces Penta part numbers 3808616 and 874572.Fits the following Penta diesel engines: D3-110I-A, D3-110I-B, D3-110I-C, D3-110I-D, D3-110I-E, D3-130A-A, D3-130A-B, D3-130A-C, D3-130I-A, D3-130I-B, D3-130I-C, D3-140A-D, D3-140A-E, D3-150I-D, D3-150I-E, D3-160A-A, D3-160A-B, D3-160A-C, D3-160I-A, D3-160I-B, D3-160I-C, D3-170A-D, D3-170A-E, D3-170I-D, D3-170I-E, D3-190A-B, D3-190A-C, D3-190I-A, D3-190I-B, D3-190I-C, D3-200A-D, D3-200A-E, D3-200I-D, D3-200I-E, D3-220A-D, D3-220A-E, D3-220I-D, D3-220I-E, D4-180I-B, D4-180I-C, D4-180I-D, D4-180I-E, D4-210A-A, D4-210A-B, D4-210I-A, D4-210I-B, D4-225A-B, D4-225A-C, D4-225A-D, D4-225A-E, D4-225I-B, D4-225I-C, D4-225I-D, D4-225I-E, D4-260A-A, D4-260A-B, D4-260A-C, D4-260A-D, D4-260A-E, D4-260D-B, D4-260D-C, D4-260D-D, D4-260D-E, D4-260I-A, D4-260I-B, D4-260I-C, D4-260I-D, D4-260I-E, D4-300A-A, D4-300A-C, D4-300A-D, D4-300A-E, D4-300D-A, D4-300D-C, D4-300D-D, D4-300D-E, D4-300I-A, D4-300I-C, D4-300I-D, D4-300I-E, D6-280A-A, D6-280A-B, D6-280A-C, D6-280A-D, D6-280A-E, D6-280I-A, D6-280I-B, D6-280I-C, D6-280I-D, D6-280I-E, D6-310A-A, D6-310A-B, D6-310A-C, D6-310A-D, D6-310A-E, D6-310D-B, D6-310D-C, D6-310D-D, D6-310D-E, D6-310I-A, D6-310I-B, D6-310I-C, D6-310I-D, D6-310I-E, D6-330A-B, D6-330A-C, D6-330A-D, D6-330A-E, D6-330D-B, D6-330D-C, D6-330D-D, D6-330D-E, D6-330I-B, D6-330I-C, D6-330I-D, D6-330I-E, D6-350A-A, D6-350A-B, D6-370A-B, D6-370A-C, D6-370A-D, D6-370A-E, D6-370D-A, D6-370D-B, D6-370D-C, D6-370D-D, D6-370D-E, D6-370I-A, D6-370I-B, D6-370I-C, D6-370I-D, D6-370I-E, D6-400A-E, D6-435D-A, D6-435D-C, D6-435D-D, D6-435D-E, D6-435I-A, D6-435I-C, D6-435I-D, D6-435I-E.