Honda EG1400X / EG2500 — Spark Plug Service
Maintenance
For the Honda EG1400X / EG2500, from the Honda owner's manual.
Applies to: Honda GX120K1 engine, Honda GX160K1 engine
Before you start
- If the engine has been running, the muffler will be very hot. Be careful not to touch the muffler.
- An improperly tightened spark plug can become very hot and could damage the engine.
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.
- Visually inspect the spark plug. Discard it if the insulator is cracked or chipped.
- Clean the spark plug with a wire brush if it is to be reused.
- Measure the plug gap with a feeler gauge; adjust by carefully bending the side electrode.
- Thread the spark plug in by hand to prevent cross-threading.
- If installing new, tighten 1/2 turn after seating; if reusing, tighten 1/8 - 1/4 turn after seating.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Recommended spark plugs: BPR6ES (NGK), W20EPR-U (NIPPONDENSO)
- Gap: 0.70-0.80 mm (0.028-0.031 in)
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.