Kohler — Electric Starting System Tests
Testing & diagnosis · Starter System
From a Kohler service manual covering: SH255, SH265, SH270. Check it applies to your exact model before use.
Applies to: Kohler SH255
Procedure
- Test battery on unit. Connect DC voltmeter across battery terminals and read voltage (key switch OFF). Turn key switch to start position and read voltage again.
- Remove electric starter cover panel and check fuse inside plastic holder.
- Disconnect blue relay lead. Connect jumper from positive battery terminal to relay terminal.
- Use known good battery and jumper cables to test starter motor.
- Disconnect leads from starter relay and remove it for testing. Check relay resistance and operation.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Battery voltage should not fall below 9 volts during cranking
- Relay resistance less than 3.4 ohms or open circuit indicates faulty relay
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.