Kohler — Speed Sensor Test Procedure
Testing & diagnosis
From a Kohler service manual covering: 10RFOY, 10ROY, 15RFOY, 15ROY, 6RFOY, 6ROY. Check it applies to your exact model before use.
Applies to: Kohler 10RFOY, Kohler 10ROY, Kohler 15RFOY, Kohler 15ROY, Kohler 6RFOY, Kohler 6ROY, Yanmar 3TN75E-RK engine, Yanmar 4TN84E-RK engine
Procedure
- Remove Speed Sensor from end bracket.
- Connect Speed Sensor, voltmeter, and DC voltage source as shown.
- Touch sensing surface with a flat piece of iron or steel at least 1/4 cubic inch.
- Voltmeter test reading should equal source voltage.
- Remove iron or steel from sensing surface; voltmeter should indicate no voltage.
- Reinstall Speed Sensor to end bracket using all original hardware.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Air gap between Speed Sensor and actuator 0.030 in. (0.76 mm) +/-0.010 in. (0.25 mm)
Full service-parts list: Kohler 10RFOY →, Kohler 10ROY →, Kohler 15RFOY →, Kohler 15ROY →, Kohler 6RFOY →, Kohler 6ROY →, Yanmar 3TN75E-RK engine →
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.