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Interchangeable with 3791021 / 03781021
Outdrive Lower Unit Sea Ray OMC Stern Drive
Part numbers:
Widely used from in every OMC Stringer 400 800 platform 1981-1985 (2
Removed from a 1963 Mercury 50hp 500E 4cyl (Serial Number: 1553XX8 - I cant read some of the numbers)
MerCruiser Alpha one V6 V8 305 350 3-groove water Pump Pulley 15120T 90840 Fuel Lines & Filters Interchangeable with 3791021 / 03781021Item Details MerCruiser 3 Groove Pulley 90840 90840A1 15120T 15120 Generally used 1982 1996 (mostly just the early stuff but referenced in the newer parts manuals) on V6 4. 3L 185hp, 205hp GM 5. 0L 305 V8 5. 7L 350 *******5 1 2" Diameter (MEASURE YOUR PULLEY or find the stamped part number) People tend to order this by mistake to replace the 7" pulley (please don't be one of those people) 2 3 4" Tall Notable Part Number(s) 90840 90840A1 15120T 15120