Application30hp Serial Range: 0C159200-0G589999 35hp Serial Range: 6445653 & LATER 40hp 2cyl Serial Range: 4860103-6445653 40hp 4cyl Serial Range: 0C159200 & LATER 45hp Serial Range: 5531630 & LATER 50hp 4cyl Serial Range:4962056 & LATER 50hp 3cyl Serial Range: 6428681-0D000749 60hp Serial Range: 6428681-0D000749 65hp 3cyl Serial Range: 4382057-4571651 70hp Serial Range: 4977157-0B110053SpecificationReplaces part numbers: Compatible for Mercury Marine 46-77177A3 for Sierra Marine 18-3324 Package Includes1x Impeller 1x Upper Pump Housing 1x Water Pump Base 1x Drain Gasket 1x Lower Water Pump Base to Face Plate Gasket 1x Upper Face Plate to Body Gasket 2x Water Pump Base Gasket 1x Drain Plug 1xPlate 3x O-RingNote* Professional installation is highly recommended (No Instruction Included) * For any needs please contact us