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Mercruiser Outdrive Shim Kit Application Guide

Forward gear, driven gears and upper cover bearing shim kits Upper gearcase bearing shim kits Shims for upper gearcase Shims for lower gearcase

Model	Year	Serial number	For gear bearing shim kit	Rev gear shim kit	Driven gear shim kit	Drive gear shim kit	Upper cover shim kit	Driven gear spacer
I	1963	1534570-1536617			N.L.A.	N.L.A.	23261	N / A
I	1963	1536618-1684187			N.L.A.	N.L.A.	23261	N / A
IA/IB/IC & EZ SHIFT	1964-1966	1684188-2065186	23220		23270	23280	23261	N / A
120/140	1967	2062141-2187468	23220		23270	23280	23270	28380
120/140	1967-1969	2187469-2791956	23220		23270	23280	23261	28380
120/140	1970-1971	2791957-3134193	23220		23270	23280	N/A	28380
120/140	1971-1977	3213658-4893634	23220	23290	23270	23280	23260	28380
120/140	1978-1982	4893635-6225576	23220		23270	23280	23260	28380
470	1976-1977	4208730-4893934	23220	23290	23270	23280	23260	28380
470/485	1978-1982	4893935-6225575	23220		23270	23280	23260	28380
160	1967	2065190-2182197	23220		23270	23280	23270	28380
160	1967-1969	2182198-2763441	23220		23270	23280	23261	28380
165	1970-1971	2182198-2763441	23220		23270	23280	N/A	28380
165	1971-1977	3213658-4890459	23220	23290	23270	23280	23260	28380
165	1978-1981	4890460 and Up	23220		23270	23280	23260	28380
888	1971-1972	3106717-3472477	23220		23270	23280	N/A	28380
888	1973-1977	3472478 and Up	23220		23270	23280	23260	28380
225-S	1974	3856268-4200499	23220		23270	23280	23260	28380
233	1975-1977	4200500 and Up	23220		23270	23280	23260	28380
898/228	1977	4782330-4898729	23220		23270	23280	23260	28380
898/228	1978-1982	4898730-6225576	23220	23290	23270	23280	23260	28380
250	1977	4791300-4898729	23220		23270	23280	23260	28380
260	1978-1982	4898730-6225576	23220	23290	23270	23280	23260	28380
R	1983-1984	6225577 and Up	23220	23290	23270	23280	23260	28380
MR/Alpha One Gearcase	1984-1990	6225577 and Up	23220	N/A	23270	23280	23260	28380
MR/Alpha One Gearcase (CR)	1983-1990	6225577 and Up	-	23220	23270	23280	23260	28380
Alpha One SS	1986-1989	0A545004 and Up	23220	N/A	N/A	23280	23260	28380
Alpha One Gen II	1991-1995	0D469859-0F679999	23220	N/A	23270	23280	23260	28380
Alpha One Gen II	1996 and Newer	0F680000 and Up	23221	N/A	23270	23280	23261	28380
Alpha One Gen II (CR)	1991-1995	0D469859-0F679999		23220	23270	23280	23260	28380
Alpha One Gen II (CR)	1996 and Newer	0F680000 and Up	-	23221	23270	23280	23261	28380
215E/H	1970-1972	2782203-2915034		N/A	N.L.A.	N.L.A.	N/A

Customers also purchased:

21450 Shift cable 865436A03	P/N 21450 Shift cable kit. Newer style cable with larger core wire. Compatible with 1967 - present Mercruiser and Alpha 1 models. OEM 865436A03 $89.99 Installs from the AFT end of the bell housing. Models from the mid 1960's - 1982 used cables which threaded in from behind the bell housing. You can make an easy modification to the bell housing yourself by using a 1/4-18 tap from inside of the bell housing.
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
89100 Exhaust 18654A1	P/N 89100 Exhaust bellow - includes clamps and grounding clips. Replaces 18654A1 or Sierra 18-2750 $26.99
87511	P/N 87511 Lower gearcase seal kit, replaces 26-816575A3 Alpha 1 Generation 2 (1991 and up) Serial numbers OD469859 - up. $41.99

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