Kohler M18 / M20 — Check and Service Spark Plugs
Maintenance
For the Kohler M18 / M20, from the Kohler service manual.
Applies to: Kohler M18 / M20 engine
Before you start
- Do not clean spark plugs with abrasive grit
Procedure
- Clean area around base of plugs before removing.
- Remove plugs and check condition; replace if worn.
- Check gap with wire feeler gauge and adjust to 0.035 in.
- Reinstall into cylinder heads and torque to 10/15 ft lb.
Tools required
- Wire feeler gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Champion RV17YC Amazon eBay FridayParts $22.99 or equivalent
- Gap 0.035 in
- Torque 10/15 ft lb
Source: Kohler service 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.