Page 212 - US ACCESSORIES GUIDE (2019)

RACING

2.5L Sport Master Gearcase w/o Torque Tab GEAR CONVERSION KIT

Ratio Rotation Torque Tab Shaft Length Part Number Service Housing
1.62:1 RH No S(15) 1687-840561A27 1600-8M0084203
1.62:1 RH No L(20) 1687-840561A28 1600-8M0084203
1.62:1 RH No XL(25) 1687-840561A29 1600-8M0084203
1.75:1 RH No S(15) 1600-8M0084203
1.75:1 RH No L(20) 1600-8M0084203
1.75:1 RH No XL(25) 1600-8M0084203
1.87:1 RH No S(15) 1687-840561T33 1600-8M0084203
43-849189T 2
1.87:1 RH No L(20) 1687-840561T34 1600-8M0084203
To convert a 1.87:1 or 2.00:1 ratio RH rotation gearcase to a 1.75:1 ratio
1.87:1 RH No XL(25) 1687-840561A35 1600-8M0084203 Fits 2.5L outboards
2.00:1 RH No S(15) 1687-840561T36 1600-8M0084203
2.00:1 RH No L(20) 1687-840561A37 1600-8M0084203 WATER PRESSURE RELIEF VALVE KIT
2.00:1 RH No XL(25) 1687-840561A38 1600-8M0084203
WATER PRESSURE RELIEF VALVE KIT
2.5L Sport Master Gearcase Counter Rotation

Ratio Rotation Torque Tab Shaft Length Part Number Service Housing
1.62:1 LH No S(15) 1687-840561A63 1600-8M0084203
1.62:1 LH No L(20) 1687-840561A64 1600-8M0084203
1.62:1 LH No XL(25) 1687-840561A65 1600-8M0084203
1.75:1 LH No S(15) 1600-8M0084203
1.75:1 LH No L(20) 1600-8M0084203
1.75:1 LH No XL(25) 1600-8M0084203 863208A 3
1.87:1 LH No S(15) 1687-840561T69 1600-8M0084203 The purpose of this kit is to regulate engine block water pressure to a maximum of
30 psi and vent excess water overboard.
1.87:1 LH No L(20) 1687-840561T70 1600-8M0084203
Fits all MCM engines in high performance applications where engine block water
1.87:1 LH No XL(25) 1687-840561T71 1600-8M0084203 pressures are exceeding the maximum 30 psi.
2.00:1 LH No S(15) NLA 1600-8M0084203
2.00:1 LH No L(20) NLA 1600-8M0084203 SPACER KITS
2.00:1 LH No XL(25) NLA 1600-8M0084203
SIX SSM SPACER KIT

2.5L Torque Master Gearcase

Ratio Rotation Torque Tab Shaft Length Part Number Service Housing RACING
1.87:1 RH Yes L(20) 1686-827214T25
2.00:1 RH Yes L(20) 1686-827214T25

OUTBOARD GEAR SET FOR 2.5L MODELS
GEAR CONVERSION KIT 846743A 1
.50 inch (12.7 mm) spacer
846562A 1
1 inch (25.4 mm) spacer
846563A 1
1.50 inch (38.1 mm) spacer
846744A 1
2 inch (50.8 mm) spacer
846745A 1
2.50 inch (63.5 mm) spacer
846564A 1
43-848855T 2 3 inch (76.2 mm) spacer
To convert a 1.87:1 or 2.00:1 ratio RH rotation gearcase to a 1.62:1 ratio
Fits 2.5L outboards

2019 US Accessories Guide 199