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Home›Repair guides›Yamaha›Spark plug inspection

Yamaha EF1000iS / EF6300iSDE — Spark plug inspection

Maintenance

For the Yamaha EF1000iS / EF6300iSDE, from the Yamaha owner's manual.

Procedure

  1. Remove the screws, pull outward on front cover.
  2. Remove the spark plug cap and then remove the spark plug.
  3. Check for discoloration and remove the carbon.
  4. Check the spark plug type and gap.
  5. Install the spark plug.
  6. Install the spark plug cap.
  7. Install the front cover and tighten the screws.

Tools required

  • Wire thickness gauge Amazon
  • Torque wrench (recommended) Amazon

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Specs & values

  • Gap 0.7-0.8mm (0.028-0.031in)
  • Torque 20 Nm (14 ft-lbf)

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.

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