19
MAINTENANCE
Checking Spark Plug
• Remove cap.  Then remove spark plug cap.
• Disconnect the spark plug wire from the spark plug.
• Before removing the spark plug, clean the area around its base to prevent debris from
entering the engine.
• Insert a spark plug socket wrench through the opening on the outside of the cover.  Turn
the wrench counterclockwise.
• Check for discoloration and clean carbon deposits off the electrode with a wire brush.
• Check the electrode gap and slowly adjust to 0.6 - 0.7mm (0.024-0.028 in) if necessary.
• Reinstall spark plug and tighten to Torque 20.0Nm (14.8ft-lb).
• If spark plug is worn replace only with an equivalent replacement part. Spark plug
should be replaced annually.
• Reconnect spark plug wire.
• Replace spark plug cap, then replace cap.
Standard Spark Plug: E6TC/E6RTC/BPR7HS 
Spark Plug Gap: 0.6 - 0.7mm (0.024
-0.028 in) 
Spark Plug Torque: 20.0Nm (14.8ft-lb)
Carburetor Adjustment
The carburetor is low emission and is equipped with a non-adjustable idle mixture valve.  If adjustment is needed contact an 
authorized dealer.
0.6-0.7mm
Oil Recommendations
•
•
Do not use special additives.
Outdoor temperatures determine the proper oil viscosity for the engine. Use the chart to select the best viscosity for the 
outdoor temperature range expected.
-22
-4
14
32
50
68
86
104
-30
-20
-10
0
10
20
30
40
SAE 30
10W-30
Synthetic 5W-30
 0W-30
*
*
*
C
F
Above 80 F
the use of 10W-30 
may cause increased oil consumption. 
Check oil level more frequently
.
Note:  
*
*
 (4 C
) the use of SAE 30 
(27 
C
) 
  Below 40 F
*
will result in hard starting.