XY Powersports XY500UTV, Руководство по обслуживанию

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13. TROUBLESHOOTING
13-3
Complaint Symptom and Possible Causes Remedy
Poor engine
running in
high-speed
range.
1. Weak valve spring
2. Worn camshaft
3. Fouled spark plug
4. Insufficient spark plug gap
5. Improper valve timing
6. Faulty ignition coil
7. Weak high pressure fuel pump,
resulting in poor fuel supply
8. Dirty air filter
Replace
Replace
Clean or replace
Adjust or replace
Replace
Adjust
Adjust or replace
Clean or replace
Exhaust smoke
is dirty or thick
1. Excessive engine oil
2. Worn piston ring
3. Worn valve guide
4. Scored or scuffed cylinder wall
5. Worn valve stem
6. Worn valve stem oil seal Check oil level and
drain
Replace
Replace
Replace
Replace
Replace
Engine lacks
power
1. Improper valve clearance
2. Weak valve spring
3. Improper valve timing
4. Worn cylinder
5. Worn piston ring
6. Improper valve seating
7. Fouled spark plug
8. Improper spark plug gap
9. Clogged fuel injector
10. Dirty air filter
11. Worn rocker arm or rocker arm
shaft
12. Air leakage from air intake pipe
13. Excessive engine oil
Adjust
Adjust
Adjust
Replace
Replace
Replace or Correct
Clean or replace
Clean or replace
Clean or replace
Adjust fuel level
Clean or replace
Tighten or replace
Check oil level and
drain
Engine
overheats
1. Carbon deposit on piston top
2. Insufficient or excessive engine
oil
3. Faulty oil pump
4. Clogged oil passage
5. Air leakage from air intake pipe
6. Incorrect engine oil
7. Faulty cooling system(7-5) Clean
Check level, add or
drain
Replace
Clean
Tighten or replace
Change engine oil
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