Generac G-Force 400 Series / RTG16EZA3 — Inspecting and Replacing Spark Plug(s)
Maintenance
For the Generac G-Force 400 Series / RTG16EZA3, from the Generac owner's manual.
Applies to: Generac G-Force 400 Series engine, Generac G-Force 800 Series engine, Generac G-Force 1000 Series engine
Before you start
- Do not disconnect spark plug wires with engine running.
Procedure
- With generator OFF and engine cool, lift lid and remove front panel.
- Clean area around base of spark plug(s).
- Remove spark plug(s) and inspect; install new if worn.
- Clean by scraping or wire brush; do not blast.
- Inspect gap with a wire feeler gauge.
- Install spark plug(s) and tighten to 18.4 ft-lbs (25 Nm).
- Press AUTO to return unit to AUTO mode.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Spark plug gap 0.020 in (10 kW); 0.040 in (14–24 kW)
- Torque 18.4 ft-lbs (25 Nm)
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.