Generac — Cleaning/Gaping/Replacing Spark Plugs
Maintenance · Ignition system
From a Generac owner's manual covering: XG03245, XG04045, XG04845. Check it applies to your exact model before use.
Applies to: Generac Model, Generac Number, Generac XG03245, Generac XG04045, Generac XG04845
Before you start
- Electric shock. Do not disconnect spark plug wires with engine running. Doing so could result in death or serious injury. (W000140)
Procedure
- Remove negative battery cable.
- Remove spark plug cables from terminals.
- Clean area around spark plugs.
- Remove spark plugs with spark plug socket.
- Inspect threads; clean with thread chaser if needed.
- Clean spark plugs with wire brush and solvent; do not blast.
- Inspect gap with wire feeler gauge; gap 0.012-0.017 in (0.31-0.45 mm).
- Adjust gap by bending ground electrode.
- Finger tighten spark plugs; tighten to 28 ft-lb (38 Nm) with socket.
- Install spark plug cables; verify captured in clips.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- gap 0.012-0.017 in (0.31-0.45 mm)
- torque 28 ft-lb (38 Nm)
Full service-parts list: Generac Model →, Generac Number →, Generac XG03245 →, Generac XG04045 →, Generac XG04845 →
Source: Generac 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.