Sierra Marine Parts Catalog: Mercruiser
LOWER GEAR HOUSING
Replaces: 1623-8951A27,
UPPER UNIT
1623-8951A37
GEAR REPAIR KIT
For: MR/ALPHA Style
Replaces: 43-803102T1
Bore size 3.2635-3.2650. Includes tapered roller bearing for non-tractor 14/28
or 17/28 gears. When installing new gears use 18-2206-1 gear kit which includes
For: 20-22 Teeth: 1.50:1 (1.47:1)
tapered roller bearing 18-1156 for tractor 13/21 gears.
Gen II applications serial number range up to OK999999 only
UPPER UNIT
UPPER UNIT
GEAR REPAIR KIT
GEAR REPAIR KIT
Replaces: 43-803118T1
Replaces: 43-803119T1
For: 20-24 Teeth: 1.98:1 (1.94/2.40:1)
For: 24-24 Teeth: 1.65:1 (1.62:1)
Gen II applications serial number range up to OK999999 only
Gen II applications serial number range up to OK999999 only
UPPER UNIT
UPPER UNIT
GEAR REPAIR KIT
GEAR REPAIR KIT
Replaces: 43-803104T1
Replaces: 43-803120T1
For: Gen II (1998 & Up)(S/N OL100040 & Up)
For: 17-19 Teeth: 1.84:1 (1.81:1)
Gen II applications serial number range up to OK999999 only
1.62:1 and 2.00:1 Ratio
UPPER UNIT
UPPER UNIT
GEAR REPAIR KIT
GEAR REPAIR KIT
Replaces: 43-803103T1
Replaces: 43-803106T1
For: Gen II (1998 & Up)(S/N OL100040 & Up)
For: Gen II (1998 & Up)(S/N OL100040 & Up)
1.47:1 Ratio
1.94:1 and 2.40:1 Ratio
UPPER UNIT GEAR SET
Replaces: 43-18410A2,
43-18411A2
Includes: (1) 18-1142
Mercruiser #31-32573A1
(1.5:1 Ratio)
UPPER UNIT
(Drive Gear = 22 teeth Driven Gear = 20 teeth)
GEAR REPAIR KIT
For most V-8 Drives and Gen II (S/N K999999 & BELOW)
Replaces: 43-803105T1
Stern Drive Model
Beg. S/N
End. S/N
Stern Drive Model
Beg. S/N End. S/N
225
3856268
4200499
888
3106717
& UP
For: Gen II (1998 & Up)(S/N OL100040 & Up)
710
260
4898730
6225576
V8R/MR/AlphaOne
6225577
& UP
1.81:1 Ratio
898/228
4782330
6225576