Honda EB5000 — Spark Plug Service
Maintenance
For the Honda EB5000, from the Honda owner's manual.
Applies to: Honda GX340 engine
Before you start
- Never use spark plugs which have an improper heat range; use only recommended spark plugs or equivalent.
Procedure
- Remove the spark plug cap.
- Clean any dirt from around the spark plug base.
- Use the wrench supplied in the tool kit to remove the spark plug.
- Inspect the spark plug; discard if insulator is cracked or chipped; clean with a wire brush if reused.
- Measure the plug gap with a feeler gauge.
- Check the spark plug washer and thread the plug in by hand.
- After the plug is seated, tighten with a spark plug wrench to compress the washer.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Spark plug gap: 0.7 - 0.8 mm (0.028 - 0.031 in)
- New plug: tighten 1/2 turn after seating
- Used plug: tighten 1/8 - 1/4 turn after seating
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.