Yamaha EF2400iS — Spark Plug Inspection
Maintenance
For the Yamaha EF2400iS, from the Yamaha owner's manual.
Procedure
- Loosen the bolt and remove the side cover.
- Remove the spark plug cap and the spark plug.
- Check for discoloration and remove the carbon.
- Check the spark plug type and gap.
- Install the spark plug.
- Install the spark plug cap.
- Install the side cover and tighten the bolt.
Specs & values
- Standard spark plug: BPR4ES FridayParts $49.00 (NGK)
- Spark plug gap: 0.7–0.8 mm (0.028–0.031 in)
- Spark plug torque: 17.5 N•m (1.75 kgf•m, 13 lbf•ft)
- Standard electrode color: Tan Color
Source: Yamaha owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.