Yamaha YG4000DC Owners Manual - Page 32

Spark Plug Inspection, Carburetor Adjustment

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AE00971 SPARK PLUG INSPECTION You should periodically remove and inspect the spark plug. 1. Check for discoloration and remove the carbon. Standard electrode color: 760-011 Tan Color 2. Check the spark plug type and gap. Standard Spark Plug: BPR4ES (NGK) a Spark Plug Gap: 760-001a 0.7-0.8 mm (0.028-0.031 in) a Gap 3. Install the spark plug. Spark Plug Torque: 20 N•m (2 kgf•m, 14 lbf•ft) AE00431 CARBURETOR ADJUSTMENT The carburetor is a vital part of the engine. Adjusting should be left to a Yamaha dealer with the professional knowledge, specialized data, and equipment to do so properly. - 27 -

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– 27 –
760-011
a
760-001a
AE00971
SPARK PLUG INSPECTION
You should periodically remove and inspect the spark
plug.
1.
Check for discoloration and remove the carbon.
2.
Check the spark plug type and gap.
a
Gap
3.
Install the spark plug.
AE00431
CARBURETOR ADJUSTMENT
The carburetor is a vital part of the engine. Adjusting
should be left to a Yamaha dealer with the profession-
al knowledge, specialized data, and equipment to do
so properly.
Standard electrode color:
Tan Color
Standard Spark Plug:
BPR4ES (NGK)
Spark Plug Gap:
0.7
–
0.8 mm (0.028
–
0.031 in)
Spark Plug Torque:
20 N
•
m (2 kgf
•
m, 14 lbf
•
ft)