Mercruiser and Alpha One (up to 1990) exploded view lower unit drawing
Water pump components, impellers, seals and shafts
Manufactured by GLM, California. All parts include a 2 year warranty
Easy to identify photos with OEM Mercury numbers
Photo
Description / OEM #
Price
(USD)
Price
(Canadian)
12110 Water pump
Item A P/N 12120Complete water pump kit (1984 – 1990, MR and Alpha One, serial numbers 6854393-OD469858). Click on picture for older MC-1, R and 1991 and up Gen 2 models.
$42.99
$ 63.89
51220 GM manifold
Item B P/N 51220GM 4.3L V6 exhaust manifold, center rise for 1986 and up models. Click on photo for all other engine / model manifolds.
99746A17
$218.95
$ 375.89
SEI Marine Mercruiser
Lower Unit 1623-8951A43
Item C SE106 Aftermarket SEI lower unit Mercruiser / Alpha One Gen 1 complete lower units. For 1970 – 1990 models, serial numbers 2791957-OD469858 with 13 spline vertical driveshaft, for up to 300 horsepower.