Sierra Marine Parts Catalog

856 I/O — MERCRUISER - Drive System 18-4458 EXHAUST PROTECTOR VALVE (Fits both 5" & 6" Exhaust) INCLUDES STAINLESS STEEL CLAMP 18-4456 EXHAUST PROTECTOR VALVE Replaces: 34765A1, 34765A2 INCLUDES STAINLESS STEEL CLAMP 3" 18-4457 EXHAUST PROTECTOR VALVE Replaces: 12644A1, 12644Q01 INCLUDES STAINLESS STEEL CLAMP 4" ➁ 18-4458D ➁ Items ending in "D" are Display Packaged - Regular number is Non-Display ➁ 18-4457D ➁ 18-4456D ➀  Inner ➁  Outer ➂  w/o Fishline Cutter Seal Model Year Beginning Serial # Ending Serial # Driveshaft Hsg Seal Kit J-Joint Seal U-Joint Carrier Seal Gear Hsg Seal & Brg Kit Gear Hsg Seal Kit Brg Carrier O-Ring Brg Carrier Seal 60 / 80 / 90 1965-1972 1830753 3225967 N/A N.L.A. N/A N/A N/A 18-7160 18-2011 IA / IB / IC / EZ SHIFT 1964-1966 1684188 2065186 18-2648 18-2003 18-0577 N/A 18-2652 18-7159 18-2002 120 / 140 1967-1982 2062141 6225576 18-2648 18-2003 18-0577 N/A 18-2652 18-7159 18-2002 470 / 485 1976-1982 4208730 6225575 18-2648 18-2003 18-0577 N/A 18-2652 18-7159 18-2002 160 / 165 1967-1981 2065190 & UP 18-2648 18-2003 18-0577 N/A 18-2652 18-7159 18-2002 888 1971-1977 3106717 & UP 18-2648 18-2003 18-0577 N/A 18-2652 18-7159 18-2002 225 / 233 1974-1977 3856268 & UP 18-2648 18-2003 18-0577 N/A 18-2652 18-7159 18-2002 888 / 228 / 250 / 260 1977-1982 4782330 6225576 18-2648 18-2003 18-0577 N/A 18-2652 18-7159 18-2002 R 1983 6225577 & UP 18-2648 18-2003 18-0577 N/A 18-2652 18-7159 18-2002 MR ALPHA ONE 1984-1990 6225577 D469858 18-2648 18-2003 18-0577 18-8208 18-2652 18-7159 18-2002 ➂ MR ALPHA ONE 1984-1990 6225577 D469858 18-2648 18-2003 18-0577 18-8208 18-2652 18-7159 18-2077 ➀ MR ALPHA ONE 1984-1990 6225577 D469858 18-2648 18-2003 18-0577 18-8208 18-2652 18-7159 18-2076 ➁ MR ALPHA ONE (CR) 1984-1990 6225577 D469858 18-2648 18-2003 18-0577 N.L.A. 18-2652 18-7159 18-2077 ➀ MR ALPHA ONE (CR) 1984-1990 6225577 D469858 18-2648 18-2003 18-0577 N.L.A. 18-2652 18-7159 18-2076 ➁ ALPHA ONE SS 1986-1989 A545004 & UP 18-2648 18-2003 18-0577 N/A 18-2652 18-7159 18-2002 ➂ ALPHA ONE SS 1986-1989 A545004 & UP 18-2648 18-2003 18-0577 N/A 18-2652 18-7159 18-2077 ➀ ALPHA ONE SS 1986-1989 A545004 & UP 18-2648 18-2003 18-0577 N/A 18-2652 18-7159 18-2076 ➁ APLHA ONE GEN II 1991-1995 D469859 F679999 18-2644 18-2003 18-0577 N/A 18-2646-1 18-7159 18-2077 ➀ APLHA ONE GEN II 1991-1995 D469859 F679999 18-2644 18-2003 18-0577 N/A 18-2646-1 18-7159 18-2076 ➁ APLHA ONE GEN II (CR) 1991-1995 D469859 F679999 18-2644 18-2003 18-0577 N.L.A. 18-2646-1 18-7159 18-2077 ➀ APLHA ONE GEN II (CR) 1991-1995 D469859 F679999 18-2644 18-2003 18-0577 N.L.A. 18-2646-1 18-7159 18-2076 ➁ APLHA ONE GEN II 1996-1997 F680000 K999999 18-2644 18-2003 18-0577 N/A 18-2646-1 18-7159 18-2077 ➀ APLHA ONE GEN II 1996-1997 F680000 K999999 18-2644 18-2003 18-0577 N/A 18-2646-1 18-7159 18-2076 ➁ APLHA ONE GEN II (CR) 1996-2010 F680000 & UP 18-2644 18-2003 18-0577 N.L.A. 18-2646-1 18-7159 18-2077 ➀ APLHA ONE GEN II (CR) 1996-2010 F680000 & UP 18-2644 18-2003 18-0577 N.L.A. 18-2646-1 18-7159 18-2076 ➁ APLHA ONE GEN II 1998-2010 L100040 & UP 18-2644 18-2003 18-0577 N/A 18-2646-1 18-7159 18-2077 ➀ APLHA ONE GEN II 1998-2010 L100040 & UP 18-2644 18-2003 18-0577 N/A 18-2646-1 18-7159 18-2076 ➁ BRAVO I 1988-2010 B664190 & UP 18-2643 N/A N/A N/A 18-2645 18-7159 18-2002 BRAVO I X 2000-2010 M100001 & UP 18-2643 N/A N/A N/A 18-2645 18-7159 18-2002 BRAVO I XR/XZ 2000-2010 M100001 & UP 18-2643 N/A N/A N/A N/A 18-7159 N/A BRAVO II 1988-2010 B664190 & UP 18-2643 N/A N/A N/A 18-2645 N/A N/A ➁ BRAVO II 1988-2010 B664190 & UP 18-2643 N/A N/A N/A 18-2645 N/A N/A ➀ BRAVO II X 2000-2010 M100001 & UP 18-2643 N/A N/A N/A 18-2645 N/A N/A ➁ BRAVO II X 2000-2010 M100001 & UP 18-2643 N/A N/A N/A 18-2645 N/A N/A ➀ BRAVO III 1988-2010 B664190 & UP 18-2643 N/A N/A N/A 18-2645 N/A N/A BRAVO III X 2000-2010 M100001 & UP 18-2643 N/A N/A N/A 18-2645 N/A N/A BLACKHAWK 1994-1995 F186717 & UP 18-2643 N/A N/A N/A N/A N/A N/A I 1963 1534570 1684187 18-2648 N/A 18-0577 18-2652 N/A 18-7157 18-2002 II 1962-1969 1474909 2671321 N/A N/A N/A N/A N/A 18-7159 N.L.A. III 1968-1972 2373127 3002613 N/A N/A N/A N/A N/A N/A N/A 215E/H 1970-1972 2909035 2915034 N/A N/A N/A N/A N/A N/A N/A TR 1973-1993 3377316 & UP N/A N/A N/A N/A N/A N/A N/A TRS 1973-1993 3377316 & UP N/A N/A N/A N/A N/A 18-7159 N/A