Kohler — Test SAM
Testing & diagnosis · ignition SAM module
From a Kohler service manual covering: CH18, CH20, CH22, CH23, CH25, CH620, CH630, CH640, CH670, CH680, CH730, CH740…. Check it applies to your exact model before use.
Applies to: Kohler CH18, Kohler CH740
Procedure
- Trace red power source lead from SAM to harness connection. Separate connector and connect red lead of a DC voltmeter to harness terminal. Connect black lead to grounding screw/bolt. Check voltage wit
- Disconnect all SAM leads, isolating it from engine. Test SAM with tester 25 761 21-S (ASAM only) or 25 761 40-S (ASAM and DSAM).
- Reattach SAM leads, verifying a snug fit at ignition module terminals.
- Seal base of ignition module connections with GE/Novaguard G661 or equivalent dielectric compound.
- Test for spark to be sure system is working before reinstalling blower housing.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 7.25 volts minimum
Full service-parts list: Kohler CH740 →
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.