Lower unit shaft compatible with the MC-1 model (1970 - 1983). This part has a preload pin installed on one end, with
an approximately pin diameter of 1/4 inch. Compatible with the 4 cylinder 120/140 (S/N 2791957-6225576), 470/485 (S/N 4208730-6225575),
165 (S/N 2763442 and up) and V8 - 888/225/233/898/228/250/260 (S/N 3106717 - 6225576).
Outdrive lower gear housing vertical shaft without preload pin, compatible with all MR / Alpha 1 (1st generation) models from
1984 - 1990 (S/N 6225577 and up). If you do not have the serial number of your gear case, an easy way to identify between
the Alpha 1 first generation and second generation models is by looking at the water pump housing. The Gen 1 will have a plastic
housing, while the Gen 2 (1991 and up) will have a steel impeller pump housing. GLM # 11120 replaces Mercury
# 45-42634 and Sierra # 18-2180
11150 Propeller Shaft 44-824110
Propeller shaft compatible with all models from 1970 and up. Previously, part # 11150 (OEM # 44-824110) was available for
the 1970 - 1997 models, but has been discontinued. # 11155 (OEM # 44-850308) replaces this. The length is 15-1/2 inches, and
the diameter where the bearing sits is 1-3/16 inches with 15 splines. GLM # 11155 replaces Mercury # 44-850308 and Sierra # 18-2254
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