Yanmar 1GM, Operation Manual

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2) Clutch control
2-a)
Checking the operation lever stroke. Move the
operation lever up and down (Ahead and Astern) by
disconnecting the remote control cable. Check that
the strokes between Neutral to Forward (A) and
Neutral to Reverse (B) are nearly same.
If the strokes are not the same, see your nearest
Yanmer dealer.
1. Astern
2. Ahead
2-b)
Checking the spring joint condition.
With connecting the spring joint to the control cable, check the function of the spring of the
spring joint.
If the M5 thread does not move even when you shift the control handle, the cone inside of the
clutch might be damaged. See your Yanmar dealer.