Genuine Scooter Company Buddy 170, Руководство по обслуживанию

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6. Start-up normal but idle speed unstable anytime
General trouble location: 1. Water in fuel; 2. Nozzle; 3. Spark plug; 4. Air throttle and idle air bypass; 5.Air
intake; 6. ISC; 7. Ignition timing; 8. Spark plug; 9. Engine mechanism.
Procedure for general diagnoses:
No. Operating Procedure
Detection
Results
Subsequent Steps
Yes
Repair the air intake
system.
1 Check any jam of the air filter and leakage of the air intake.
No Next step
Yes Change
2 Check the Idle governor for the control valve jammed.
No Next step
Yes Next step
3
Check the spark plug and its model and gap conformable to
specifications.
No Adjustment or change
Yes Cleaning
4
Check the air throttle and the idle air bypass for any carbon
deposition.
No Next step
Yes
Replace the defective
nozzle.
5
Disassemble the nozzle and check any leakage or jam in the
nozzle with a nozzle cleaner & analyzer.
No Next step
Yes Change fuel.
6 Check fuel and observe any trouble attributed to fuel just added.
No Next step
Yes
Eliminate any
mechanical trouble of the
engine.
7
Check pressure of the engine cylinder and find any big difference
in pressure.
No Next step
Yes Next step
8
Check if mechanical ignition timing of the engine is conformable
to specifications.
No Correct ignition timing.
Yes Diagnosis assist
9
Connect an EMS adapter and press the power switch to check
voltages at Pins
1#, 19#, and 29#
; check grounding at Pins
8#
﹐
35
#
and
36#.
No
Repair the relevant
circuits.
17