10. Reduction and reversing gear
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10. Reduction and reversing gear
Marine gear KM2P-1 is applied to the 3YM30 and 3YM20 series engines.
Refer to chapter 10 in the service manual of the GM series engines for inspection, disassembly and
reassembly.
10.1 Specifications
Model
KM2P-1
For engine models
3YM30, 3YM20
Clutch
Constant mesh gear with servo cone clutch (wet type)
Reduction
ratio
Forward
2.21
2.62
3.22
Reverse
3.06
3.06
3.06
Propeller shaft speed
(at continuous power, Forward) min
-1
1580
1332
1083
Direction of
rotation
Input shaft
Counter-clockwise, viewed from stern
Output shaft
Forward
Clockwise, viewed from stern
Reverse
Counter-clockwise, viewed from stern
Remote
control
Control head
Single lever control
Cable
Morse. 33-C (cable travel 76.2 mm)
Clamp
YANMAR made. standard accessory
Cable connector
YANMAR made. standard accessory
Output shaft
coupling
Outer diameter
100 mm
Pitch circle diameter
78 mm
Connecting bolt holes
4 - 10.5 mm
Position of shift lever, viewed from stern
Left side
Lubricating oil
API CC class, SAE #10W30
Lubricating oil capacity
0.3 liters
Dry mass
9.8 kg
Summary of Contents for 3YM20
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