Kohler — Adjust Ignition Module Air Gap
Adjustments · Electrical System
From a Kohler service manual covering: CV17, CV18, CV20, CV22, CV23, CV25, CV620, CV621, CV630, CV640, CV641, CV670…. Check it applies to your exact model before use.
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Before you start
- Ignition module air gap is critical to proper system performance. Do not attempt to set it with a business card or folded microfiche card.
Procedure
- Turn flywheel magnet away from module position.
- Attach module to mounting legs, pull it away from flywheel, and tighten screws temporarily.
- Rotate flywheel so magnet is centered under module.
- Position a 0.30 mm (0.012 in.) feeler gauge between magnet and all three legs of module.
- Loosen mounting screws, allow magnet to pull module down against feeler gauge, and retighten mounting screws.
- Rotate flywheel to remove feeler gauge, position magnet back under module, and recheck specified gap of minimum 0.28 mm (0.011 in.) under each leg.
- Torque module mounting screws to 4.0 N·m (35 in. lb.).
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Air gap 0.28/0.33 mm (0.011/0.013 in.)
- Module screw torque 4.0-6.2 N·m (35-55 in. 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.