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/BPR6HS
Spark Plug Gap: 0.6 - 0.7mm (0.024
-0.028 in)
Spark Plug T
orque: 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
 5W-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.