Kohler — Install Ignition Modules
Installation · ignition system
From a Kohler service manual covering: CH18, CH20, CH22, CH23, CH25, CH620, CH621, CH640, CH641, CH670, CH680, CH730…. Check it applies to your exact model before use.
Applies to: Kohler CH18
Procedure
- Rotate flywheel to position magnet away from ignition module bosses.
- Install each module to crankcase bosses with screws; slide modules away from flywheel; snug screws.
- Rotate flywheel to position magnet directly under one ignition module.
- Insert 0.30 mm (0.012 in.) flat feeler gauge between magnet and module.
- Loosen screws enough to allow magnet to pull module down against feeler gauge.
- Torque screws to 4.0-6.2 N·m (35-55 in. lb.).
- Repeat for other ignition module.
- Rotate flywheel back and forth; check final air gap 0.280/0.330 mm (0.011/0.013 in.).
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Ignition module fastener 4.0-6.2 N·m (35-55 in. lb.)
- Ignition module air gap 0.280/0.330 mm (0.011/0.013 in.)
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.