Kohler — Electric Starting System Test
Testing & diagnosis · Starter System
From a Kohler service manual covering: 1P18 690 06, RH255, RH265. Check it applies to your exact model before use.
Applies to: Kohler RH255, Kohler RH265, Kohler RH265-0001 engine
Before you start
- Do not crank engine continuously for more than 10 seconds. Allow a 60 second cool down period between starting attempts.
Procedure
- Test battery on unit: connect DC voltmeter across battery terminals and read voltage (switch OFF). Turn switch to start and read again.
- Remove electric starter cover panel and check fuse inside plastic holder; fuse outside holder is a spare.
- Disconnect blue relay lead. Be sure transmission is in neutral and PTO is OFF. Jumper positive battery terminal to relay terminal.
- Use a known good fully charged battery and jumper cables to test starter motor.
- Disconnect leads from starter relay and remove it for testing with an ohmmeter on Rx1 scale.
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 coil reading less than 3.4 ohms or open circuit = relay faulty
Full service-parts list: Kohler RH255 →, Kohler RH265 →
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.