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Mercruiser manifold application chart models 120-262 hp.

Exhaust manifold port and starboard Exhaust elbow Exhaust gaskets Exploded view drawings

Model number	C.I.D. cylinder	Year	Serial number	Exhaust manifold port	Exhaust manifold stbd.	Exhaust elbow	Exhaust manifold gasket	Exhaust gasket elbow
120	153 / 4	1983-1986	6229718-OB531853	51210	N/A	51130	33570	31520
2.5	153 / 4	1967-1989	OB531854-0C853255	51210	N/A	51130	33570	31520
140	181/4	1968-1982	2508261-6229717	51212	N/A	51120	33570	31520
140	181/4	1982-1986	6229718-OB450800	51210	N/A	51130	33570	31520
3.0	181/4	1987-1995	OB450801-OF603999	51210	N/A	51130	33570	31520
3.0	181/4	1998-	OL010042 and up	51214	N/A	51160	33580	31520
3.0LX	181/4	1990-1997	OC856559-OK999999	51214	N/A	51160	33580	31520
165 (4 cylinder)	224/4	1987-1987	OB434941-OB774251	51202	N/A	51180		32470
165(4 cylinder)	224/4	1987-1987	OB434941-OB774251	51200	N/A	51170		32460
170	224/4	1985-1986	6916779-OB434940	51202	N/A	51180		32470
170	224/4	1985-1986	6916779-OB434940	51200	N/A	51170		32460
180	224/4	1987-1987	OB436391-OB775248	51202	N/A	51180		32470
180	224/4	1987-1987	OB436391-OB775248	51200	N/A	51170		32460
190	224/4	1985-1986	6916779-OB436390	51202	N/A	51180		32470
3.7	224/4	1988-1989	OB774252 and up	51202	N/A	51180		32470
3.7	224/4	1988-1989	OB774252 and up	51200	N/A	51170		32460
3.7XL	224/4	1988-1989	OB775249 and up	51202	N/A	51180		32470
3.7LX	224/4	1988-1989	OB775249 and up	51200	N/A	51170		32460
470	224/4	1976-1977	4208730-4625579	-	N/A	51130		31520
470 MCM-MIE	224/4	1977-1982	4625580-6218036	-	N/A	51170		31520
470	224/4	1983-1984	6218037-6916778	51200	N/A	51170		32460
485	224/4	1980-1982	5685394-6218036	51200	N/A	51170		32370
488	224/4	1983-1984	6170297-6916778	51200	N/A	51170		32460
140(6 cylinder)	194/6	1963-1963	1538930-1725960-	N.L.A.	N/A	N.L.A.		N.L.A.
150	230/6	1964-1966	1666495-2048046	N.L.A.	N/A	N.L.A.		N.L.A.
160	250/6	1967-1969	2048022-2770031	N.L.A.	N/A	N.L.A.		N.L.A.
165(6 cylinder)	250/6	1970-1981	2770032-5813433		N/A	51120		31520
200(6 cylinder)	292/6	1969-1969	2453769-2712072		N/A	51120		31520
185(4bbl)	229/V-6	1983-1984	6330183-6919655	51220	51220	51110		30240
175	262/V-6	1987-1987	OB527955-OB773242	51220	51220	51140		30240
185(2bbl)	262/V-6	1985-1986	OA331455-OB527954	51220	51220	51110		30240
185(2bbl)	262/V-6	1985-1986	OA331455-OB527954	51220	51220	51140		30240
205	262/V-6	1985-1986	OA331455-OB527954	51220	51220	51110		30240
205	262/V-6	1985-1986	OA331455-OB527954	51220	51220	51140		30240.
205	262/V-6	1987-1987	OB527955-OB775129	51220	51220	51140		30240.
262Mag EFI (Gen+)	262/V-6	1996-1997	OF803800-OK999999	51220	51220	51140		32080
262Mag EFI (Gen+)	262/V-6	1996-1997	OF803800-OK999999	51224	51226	N/A		N/A

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