3. Checking the spark plug
WARNING
To avoid serious injury or death:
• Park the machine on a firm and level surface.
• Apply the parking brake.
• Stop the engine and remove the key before
checking the spark plug.
Check the spark plug condition and gap every 100
hours of operation. Replace the spark plug annually.
1. Remove the spark plug wire from the spark plug.
2. Use a spark plug wrench to remove the plug.
NOTE :
• This engine is equipped with a resistor-type
spark plug.
3. Inspect the spark plug for cracked porcelain, pitted
electrodes, or other wear and damage. Replace the
spark plug if necessary.
(1) Spark plug (both sides)
4. Check the spark plug gap with a gap gauge.
Recommended spark plug
NGK BPR4ES
(A) 0.7 to 0.8 mm, 0.028 to
0.031 in.
5. Reinstall the spark plug into the cylinder head.
Tightening torque
22 N
⋅
m
16 lbf
⋅
ft
4. Checking the fuel filter and fuel
lines
WARNING
To avoid serious injury or death:
• Be sure to stop the engine and remove the key
when attempting to make the following checks
and changes.
• Never fail to check the fuel lines periodically.
The fuel lines are subject to wear and aging.
Fuel may leak out onto the running engine,
causing a fire.
1. The fuel line is made of rubber and ages regardless
of service period.
EVERY 100 HOURS
PERIODIC SERVICE
Z400
59
Summary of Contents for Z411
Page 3: ...OPERATOR S MANUAL 1SFRT00108A01 READ AND SAVE THIS MANUAL MODELS Z411 Z421 Z421T ...
Page 9: ...4 Z400 ...
Page 16: ...SAFETY LABELS SAFE OPERATION Z400 11 ...
Page 17: ...SAFE OPERATION 12 Z400 ...
Page 18: ...SAFE OPERATION Z400 13 ...
Page 19: ...SAFE OPERATION 14 Z400 ...
Page 20: ...SAFE OPERATION Z400 15 ...
Page 53: ...PERIODIC SERVICE CHART LABEL MAINTENANCE PERIODIC SERVICE CHART LABEL 48 Z400 ...