Kohler — Test Low Oil Pressure (LOP) Switch

Testing & diagnosis · LOP switch

From a Kohler service manual covering: 14/20RCA/RCAL, 14RCA, 20RCA, 26RCA, 26RCA/RCAL. Check it applies to your exact model before use.

Applies to: Kohler 14RCA, Kohler 20RCA, Kohler 26RCA, Kohler CH740 / CH1000 / CH1006 engine

Procedure

Press OFF to stop engine.
Disconnect lead 13 from the switch.
Use ohmmeter/continuity tester to verify switch is closed (grounded).
Start engine and verify switch opens after a few seconds.
If not operating, remove LOP switch, install oil pressure gauge.
Start and run generator set.
Verify oil pressure within specified range before replacing LOP switch.

Tools required

Ohmmeter or continuity tester Amazon
Oil pressure gauge Amazon

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Specs & values

Engine oil pressure 172-241 kPa (25-35 FridayParts $25.27 psi)

Full service-parts list: Kohler 14RCA →, Kohler 20RCA →, Kohler 26RCA →

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.

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