Kohler — Engine Start Contact Test Procedure
Testing & diagnosis · controller engine start contacts
From a Kohler service manual — check it applies to your exact model before use.
Applies to: Kohler RDT
Before you start
- Hazardous voltage. Only authorized personnel should open the enclosure.
Procedure
- Press OFF on the generator set controller.
- Disconnect the generator set engine starting battery, negative lead first.
- Disconnect power to the transfer switch by opening the normal and emergency source circuit breakers.
- Open the enclosure and disconnect P2 from the ATS controller board.
- Connect an ohmmeter or test lamp across engine start terminals 3 and 4 on P2; verify contacts are closed.
- If contacts 3 and 4 are not closed, replace the controller circuit board.
- Reconnect the normal source and monitor contacts; verify contacts open after engine cooldown time delay.
Tools required
- ohmmeter or test lamp Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.