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Mercruiser Gear Set Lower Unit Application Chart

Last updated on 6/2/2024, 7:39:06 AM Sterndrive gear sets for upper and lower unit gearcases Application chart for all Mercruiser and Alpha 1 gears Year, engine and ratio compatibility Exploded view drawings

Model	Gear ratio	Year	Serial #	Pinion forward gear	Rev. Gear	Gear set
120 / 140	1.98	1967-1972	2062141-3443920	-	-	-
120 / 140	1.98	1972-1982	3469428-6225576	11100	11020	11300
470 / 485	1.84	1976-1982	4208730-6225575	11100	11020	11300
160	1.68	1967-1972	2065190-3443920	-	-	-
165	1.65	1972-1981	3469428 and up	11100	11020	11300
888	1.50	1971-1977	3106717 and up	11100	11020	11300
225/233	1.50/1.32	1974-1977	3856268 and up	11100	11020	11300
898/228	1.65/1.50	1977-1982	4782330-6225576	11100	11020	11300
250/260	1.50/1.32	1977-1982	4791300-6225576	11100	11020	11300
R	ALL	1983	6225577 and up	11100	11020	11300
MR/Alpha One	ALL	1984-1990	6225577 and up	11091	11013	11312
MR/Alpha One CR	ALL	1984-1990	6225577 and up	-	-	-
Alpha One SS	ALL	1986-1989	0A545004 and up	11091	11013	11312
Alpha One Gen II	1.98/1.84 1.65/1.50	1991-1995	0D469859-0F679999	11091	11013	11312
Alpha One Gen II	2.40	1991-1995	0D469859-0F679999	-	-	-
Alpha One Gen II CR	ALL	1991-1995	0D469859-0F679999	-	-	-
Alpha One Gen II	1.94/1.81 1.62/1.47	1996-1997	0F680000-0K999999	11091	11013	11313
Alpha One Gen II	2.40	1996-1997	0F680000-0K999999	-	-	-
Alpha One Gen II CR	ALL	1996 and Newer	0F680000 and up	-	-	-
Alpha One Gen II	2.00/1.94 1.81/1.62 1.47	1998 and Newer	0L00040 and up	11091	11013	11313
Alpha One Gen II	2.40	1998 and Newer	0L00040 and up	-	-	-
Bravo I	ALL	1988-1995	0B664190 and up	-	-	-

Customers also purchased:

12120 Impeller kit 1984-1990	P/N 12120 Water pump kit - years 1984 - 1990 Serial numbers 6854393 - OD469858 $42.99 Includes: P/N 89840 / 47-89984T4 Impeller P/N 12410 / 46-96148T1 Housing P/N 12820 / 23-29804T Guide tube P/N 12510 / 32435 Wear plate P/N 12322 / 46-44292A3 Pump base P/N 11070 / 28-56654 Key P/N 12810 / 48752 Cup P/N 31010 / 27-85608-1 Gasket
21950 Bellows kit 30-803097T1	P/N 21950 Transom bellows kit (1973-1990), serial numbers 3469428 - 0D469800. 30-803097T1 $145.95 Includes: P/N 21906 Gimbal bearing P/N 39622 bell housing gasket P/N 47110/47120 water hoses P/N 89050 drive shaft bellow P/N 89080 shift cable bellow P/N 89100 exhaust bellow P/N 85910 oil seal
88010	P/N 88010 Outdrive service kit for MC-1/R 1970 - 1983 $119.99   Parts included: P/N 87510 Lower unit seal kit P/N 87500 Upper housing seal kit P/N 12110 Water pump impeller kit
39622	P/N 39622 Bell housing gasket set (1983 and up, s/n 6225577 - up). For R / MR / Alpha 1 and Gen 2. $9.95 P/N 39590 Bell housing gasket set (1967-1982, s/n 2062141-6225576). For MC-1 and R. $9.95

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