Yamaha EH63 - Page 41

PERIODIC MAINTENANCE
2-15
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PERIODIC CHECKS AND ADJUSTMENTS
Measurement steps:
a. Move the throttle lever “1” to the low engine
speed position “a”.
b. Check that the low engine speed is the specified
valued.
6. Adjust:
• High engine speed
Adjustment steps:
a. Start the engine.
b. Set the engine speed to the specified value with
the throttle lever. Move the throttle lever “1” in the
direction “a” or “b” until the high engine speed
reaches the specified value with no load on the
engine.
c. Hold the throttle lever at the position where the
high engine speed reached the specified value,
then turn the screw “2” until it comes in contact
with the throttle lever and serves as a stopper.
7. Adjust:
• Low engine speed
Adjustment steps:
a. Start the engine.
b. Check that the governor arm “1” is not pulled by
the spring “2”.
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a
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b
a
High engine speed:
3200–3400 r/min
Direction “a”
High engine speed is increased.
Direction “b”
High engine speed is decreased.
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