Total Price:
Add to CartDrive Serial Number Range 2763442 - 6854392 Models which have been retro fitted with an Alpha style ( no preload pin on top of driveshaft) must use Part# 18-3420
Interchangeable with:
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
Sierra 18-3414 Mercury Water Pump Base Sierra high-quality engine parts are designed to meet OEM specifications. For Mercury Marine applications. Interchangeable...
Add to Cart
Sierra 18-3420 Mercruiser Alpha 1 Water Pump Base Sierra high-quality engine parts are designed to meet OEM specifications. This Water Pump Base fits MR & Alpha One Drives (1985-1990)...
Add to Cart
Mercury Water Pump Kit by Sierra For: 4/4.5 HP Contains: Impeller: 18-3039 Impeller Plate: 18-3139 Replaces: Mercury Marine - 46-70941A3 GLM - 12122
Add to Cart