Engine Speed (Eh63K/Eh64A/ Eh64K/Eh65A/Eh65B) - Yamaha EH63 Service Manual

PERIODIC MAINTENANCE
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ENGINE SPEED (EH63K/EH64A/EH64K/EH65A/
EH65B)
1.
Warm up the engine for several minutes.
2.
Remove:
• Air filter cover "1"
1
(Refer to "AIR FILTER" on page 3-3.)
3.
Attach:
• Digital tachometer "1"
1
4.
Measure:
• High engine speed (with no load)
Out of specification  Adjust.
Measurement steps:
a. Move the throttle lever "1" to the high engine
1
b. Check that the high engine speed is the specified
a
5.
Measure:
• Low engine speed (with no load)
Out of specification  Adjust.
2-14
Digital tachometer:
90890-06760, YU-39951-B
High engine speed:
3200–3400 r/min
speed position "a".
valued.
Low engine speed:
1500–1700 r/min