Spark Plug Inspection; Carburetor Adjustment - Yamaha EF2400iS Owner's Manual

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AE01051

SPARK PLUG INSPECTION

You should periodically remove and inspect the spark
plug.
1. Loosen the bolt 1 and remove the side cover 2.
2. Remove the spark plug cap and the spark plug.
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3. Check for discoloration and remove the carbon.
788-014
Standard electrode color:
Tan Color
4. Check the spark plug type and gap.
Standard Spark Plug:
BPR4ES (NGK)
760-031
Spark Plug Gap:
0.7–0.8 mm (0.028–0.031 in)
a Gap
5. Install the spark plug.
760-001a
Spark Plug Torque:
17.5 N•m (1.75 kgf•m, 13 lbf•ft)
6. Install the spark plug cap.
7. Install the side cover and tighten the bolt.
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.
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