Yanmar D10 Safety, Operation, Maintenance & Parts Manual page 12

OPERATION
1
Starting The Engine
3. When the engine is started, release the tensioner lever to the IDLING (down) position.
See Figure 1-3.
4. To engage the blade, press and hold the green button on the control box and push the
tensioner lever to the ENGAGED (up) position.
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FIG. 1-3
FIG. 1-3
OPERATION