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Home›Repair guides›Yamaha›Spark plug inspection

Yamaha EF4500iSE — Spark plug inspection

Maintenance

For the Yamaha EF4500iSE, from the Yamaha owner's manual.

Procedure

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

Tools required

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

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: 20.0 N•m (2.00 kgf•m, 14.8 lbf•ft)

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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