Kohler — Spark Plug Service Procedure
Maintenance · Ignition system
From a Kohler operator's manual covering: 10/13/15ERG, 10ERG, 13ERG, 15ERG, TP-6334. Check it applies to your exact model before use.
Applies to: Kohler 10ERG, Kohler 13ERG, Kohler 15ERG
Before you start
- Do not sandblast, wire brush, scrape, or otherwise service a spark plug in poor condition.
- Do not overtighten, as doing so may strip threads or alter electrode gap setting.
Procedure
- Remove spark plug wires by grasping the boot and turning slightly while pulling.
- Loosen the spark plug with a ratchet and 5/8-in. spark plug socket with a rubber insert.
- Use compressed air to remove dirt from around each spark plug.
- Remove spark plugs, one at a time, and examine.
- Clean spark plugs by wiping with a rag. File the center electrode parallel to the side electrode.
- Check the spark plug gap before installing any spark plug.
- Use a gapping tool to gently bend the side electrode to set the correct gap.
- Reinstall the spark plug.
- Torque each spark plug to 25 Nm (18 ft. lbs.).
- Use a ratchet wrench to final tighten an additional 1/4 turn.
- Clean the spark plug wire connector in the boot as necessary.
- Firmly push the spark plug boot onto the spark plug.
Tools required
- Ratchet Amazon
- 5/8-in. spark plug socket with rubber insert Amazon
- Compressed air Amazon
- Gapping tool Amazon
- Torque wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Correct gap 0.8-0.9 mm (0.031-0 FridayParts $227.74.035 in.)
- Spark plug torque 25 Nm (18 ft. lbs.)
Full service-parts list: Kohler 10ERG →, Kohler 13ERG →, Kohler 15ERG →
Source: Kohler operator'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.