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Old 02-02-2017, 01:36 PM
Mike McKown Mike McKown is offline
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Join Date: Jul 2012
Location: Indiana
Posts: 1,825
Default Kohler Command Starter relay

I'm not sure where to start on this one. This 1864 had the usual click, click starter on it that many have so I installed the relay kit as described in the photos. This is one of several I have done. This is the only one that doesn't behave.

The problem is, the starter mounted solenoid is getting a spike to engage the starter. It is momentary, about every 4-5 seconds, sometimes in a rhythm, sometimes random. Just enough to make a loud scratching sound as the starter drive hits the flywheel.

It doesn't seem to do it when the engine is running at very low speed, nor does it seem to do it when the PTO clutch is engaged. It always does it when the engine is running medium to fast without PTO.

I first tried another relay. No help.

I probed the hard shell connector mounted to the engine (blue wire) and I got a solid, very dim light on a test light with the engine running and switch in run position. I put a VOM on the same circuit. With the engine idling, I got a little less than 13 volts and the starter wasn't energizing. I revved the engine about half throttle, saw 16-17 volts on the meter and the starter started energizing again, all by itself.

If I put the wiring back the way CC built the tractor, there is no apparent problem except the occasional click, click when you try to start it.

I wouldn't think there should be any voltage present on the blue start wire with the key in the run position. Maybe I have a bad key switch because it's bleeding over internally? Maybe the increased voltage when engine speed is increased makes a faulty switch condition worse?

What say you?

PS. This isn't my engine but my engine is wired like this one.
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

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