Yamaha EH63 Service Manual page 43

PERIODIC MAINTENANCE
1
a
1
b
1
2
Measurement steps:
a. Move the throttle lever "1" to the high engine
b. Check that the high engine speed is the specified
a
5.
Measure:
• Low engine speed (with no load)
Out of specification  Adjust.
Measurement steps:
a. Move the throttle lever "1" to the low engine
b. Check that the low engine speed is the specified
6.
Adjust:
• High engine speed
Adjustment steps:
a. Start the engine.
b. Set the engine speed to the specified value with
a
Direction "a"
High engine speed is increased.
Direction "b"
High engine speed is decreased.
c. Hold the throttle lever at the position where the
2-17
speed position "a".
valued.
Low engine speed:
1900–2100 r/min
speed position "a".
valued.
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.
High engine speed:
3100–3300 r/min
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.
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