Honda — Spark Plug Service
Maintenance
From a Honda owner's manual covering: EB4000, EB5000, EB6500. Check it applies to your exact model before use.
Applies to: Honda EB4000, Honda EB6500, Honda iGX270 engine, Honda iGX390 engine
Before you start
- If the engine is hot, allow it to cool before servicing the spark plug.
- An incorrect spark plug can cause engine damage.
Parts for this job
Part numbers from the service-parts list for Honda EB6500. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Disconnect the spark plug cap and remove any dirt from around the spark plug area.
- Remove the spark plug with a spark plug wrench.
- Visually inspect; replace if the electrode is worn or the insulator is cracked, chipped, or fouled.
- Measure the electrode gap with a wire-type feeler gauge and correct by bending the side electrode.
- Thread the spark plug in by hand, then tighten with a wrench.
- Attach the spark plug cap.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Gap: 0.028–0.031 in (0.7–0.8 mm)
- TORQUE: 13.3 lbf·ft (18 N·m, 1.8 kgf·m)
- New plug: tighten 1/2 turn after seating; used plug: tighten 1/8–1/4 turn after seating
Full service-parts list: Honda EB6500 →
Source: Honda 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.