Yanmar 3YM30, Service Manual

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10. Reduction and reversing gear
176R1
10. Reduction and reversing gear
Marine gear KM2P-1 is applied to the 3YM30, 3YM20 and 2YM15 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, 2YM15
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