Mercruiser lower unit gearcase

GLM aftermarket Mercruiser lower unit gearcase
Replacement models 120 - 140 - 165 - 470 - 888

Complete lower gear housing replaces the Mercruiser MC-1/R/MR/Alpha 1 (One)
Forward bearing size: outer diameter 3.500 inch (#21590)
OEM # 1623-8951A43
GLM aftermarket #18100 with gear ratio: 13:21
For a complete listing of internal components included in the replacement gear housing, see our Mercruiser lower unit drawing page
For upper unit gearcase parts, see our Mercruiser upper gearcase page for all parts with photos

GLM aftermarket Mercuiser lower unit

# 18100 Mercruiser/Alpha 1 new aftermarket replacement lower unit gear case
(No core charge required)

$1095.09

Mercruiser / Alpha One stern drive lower gearcase

Merc. Alpha One prop shaft

omc@sterndrive.info