Kohler — Spark Plugs
Maintenance · Spark plug(s)
From a Kohler service manual covering: 10/12RESV, 12RES, 14RES, 20RES, 24RCL, 30RCL, 38RCL, 38RCLB, 48RCL, 60RCL, 6VSG, 8.5RES…. Check it applies to your exact model before use.
Applies to: Kohler 12RES, Kohler 14RES, Kohler 20RES, Kohler 24RCL, Kohler 30RCL, Kohler 38RCL, Kohler 38RCLB, Kohler 48RCL, Kohler 60RCL, Kohler 6VSG, Kohler 8.5RES
Before you start
- Servicing the air cleaner: a sudden backfire can cause severe injury. Do not operate with the air cleaner removed.
Procedure
- Disable set: press OFF button, disconnect battery charger power, remove battery cables, negative (--) lead first.
- Clean or blow out the area around the base of the plug(s) before removal to keep dirt out of the engine; wear eye protection.
- Using a spark plug socket, remove and discard the old spark plug(s).
- 24RCL, 30RCL, and 38RCLB: use a 13/16 in. socket. Other models: use a 5/8 in. spark plug socket.
- Check and set the gap of the new spark plug(s) using a wire feeler gauge.
- Adjust the gap by carefully bending the ground electrode.
- Apply a light coating of anti-seize lubricant to the spark plug threads and wipe away any excess compound.
- Install the new spark plug(s) and torque as shown in Figure 4.
- Reconnect the spark plug lead(s).
- Reconnect the battery cable, negative (--) lead last.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Spark plug gap by model (see Figure 4)
- Spark plug torque by model (see Figure 4)
Full service-parts list: Kohler 12RES →, Kohler 14RES →, Kohler 20RES →, Kohler 24RCL →, Kohler 30RCL →, Kohler 38RCL →, Kohler 48RCL →, Kohler 60RCL →, Kohler 6VSG →, Kohler 8.5RES →
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.