Kohler Starter Solenoid Wiring Diagram & More!

by Jack Grover
Reading time: 13 min Prefer to listen?

The internal combustion engine got a starter motor that needs to engage. And that happens when there’s an actuation of a starter solenoid. It stays connected with the starter motor for control. A few more pointers to know are:

Its main job is working as a contactor’s actuating coil, something made for huge electric currents.

This is also related to the connection between the battery and the starter motor.

And that’s one basic introduction to starter solenoid we wanted to give before starting this guide for the Kohler starter solenoid wiring diagram mainly.

But it won’t be the demonstration alone, we will put more details. So that you get to know all you need about the topic.


Here’s The Kohler Starter Solenoid Wiring with Easy Breakdown

The starter relay is another name for the part and for certain vehicles it’s reserved for a separate relay. About the location of the starter motor solenoid, it stays right above the starter motor.

A heavy cable is there for connecting the left side situated threaded terminal with the battery. You should be able to see a linkage on the solenoid coil’s right side. It stays inside a housing. And the job is to engage a pinion that should be seen on the motor’s right side in the housing.

Now to the diagram of Kohler starter solenoid wiring

diagram of Kohler starter solenoid wiring


  • A connects to the positive side of the battery through red color wiring.
  • B connects through a yellow color wiring to the starter motor assembly.
  • C connects with black color wire to the ground.
  • D connects through a red or green color wire to the start switch button.

So, you should get a basic idea about the wiring of Kohler starter solenoid. But in case you didn’t, here’s some explanation that should help.

There are 4 terminals in a starter solenoid. You will find 2 two tiny pin-type terminals. These are referred to as C and D in the diagram above. And there should be two thick bolt-style terminals. Those are referred to as A and B in the diagram.

Now with the thicker bolt type terminals

  • One is to get power through the battery, as the starter input terminal.
  • Other works for providing power to the starter motor assembly, and it’s known as a starter output terminal.

While with the small pin-type terminals

  • One is for current flowing towards the electrical system from the battery through a low resistance path.
  • Other is for sending a signal to the start switch button for Kohler engines starting.

Elaborating The Parts, a Bit

If you are an absolute novice in this matter, hope this segment gives you a better understanding.

The battery is a part used for starting a motor vehicle by providing electric current. And that triggers the internal combustion engine for propelling vehicles.

Then there’s the Kohler starter motor, which should not be confused with the starter solenoid by the way. This device basically cranks the engine. The system features a solenoid attached that needs to make sure power from the battery is delivered to the starter motor.

Also Read: Kohler kt745 Problems With Possible Solutions

Then there’s the ground, people refer to it as earth as well. This is a very crucial part of an electrical system without which there’s no functioning electricity. A battery comes with a negative terminal, which actually is a sort of ground. There are several wires in the engine bay that screw with bare metal only, these are also ground. It is a point that works as a conductor between positive and negative terminals.

There’s a start switch button through which the engine gets noticed for starting by the driver.

Read Also: Craftsman LT2000 Drive Belt Diagram & Explanation That You Need!

Signs of Bad Starter Solenoid in Kohler Riding Mower Engine

You can actually determine whether your Kohler riding mower engine got a worn-out or damaged starter solenoid. And it’s rather simple if you have a few tools at hand. You need a metal screwdriver, a jumper cable, a voltmeter, medium grot sandpaper, a wrench set, and a battery charger.

Here’s How To Check

  • You need to find out the battery’s charge level first. Simply contact the voltmeter’s red lead to the battery’s positive post. At the same time have negative post touch the black lead. A meter reading of any less than 12.5 volts means you need to charge the battery first before starting the riding mower.
  • For the next part, you need a solid knowledge of the Kohler engine parts. Hoping you already know quite a bit, we’ll proceed. So basically, you need to test all the connections made between the starter motor, solenoid, and battery. This is for checking any existing corrosion that could be making things extra tight.
  • If you see there are any visible corroded connections then clean those. You need to detach the battery and also use a wrench or screwdriver to undo the corroded connection. Use medium-grit sandpaper for sanding the connection pieces. So that corrosion is eliminated.
  • The gearshift should be in neutral while the parking brake should be set. Also, make sure the mower deck is disengaged. Restart the engine after reconnecting the battery.
  • You want to test the solenoid once again. Now if the engine is failing to turn over even after the cleanup, turn the ignition key on. You want to look for the huge terminal posts existing in the solenoid. The thick red wires should be connecting to those.
  • Bring the screwdriver’s metal shaft to both huge terminals at the same time. If the engine starts by this, then it means the solenoid has gone bad. And you need to replace it.

For Your Information – Certain Kohler engine models have a certain type of starter that uses both starter motor and solenoid as integrated and inseparable units. So, in case of replacement, you need to change the whole thing.

  • Now if you find out the So, the starter motor is not running, then the part itself is defective.
  • One more thing you need to know is that a few solenoids got huge terminals on opposite sides. In that case, you will require a jumper cable for making the connection between the large terminals.

This Video Will Help You Too!

Frequently Asked Question (FAQs)

Can a starter solenoid be repaired?

Burning, carboning up or sticking can happen with a solenoid due to high voltage contacts. And that can make it response with a not starting situation too.u003cbru003eHowever, in some cases, you can skip replacement and look into repair. But again, that will highly depend on the amount of damage done to the part.

Can you buy just the solenoid for the starter?

A separate purchase might or not be possible. But usually, with a Kohler starter solenoid replacement, you need to get the whole thing together because there will be an addition to the effort needed later on.

Should I replace the starter or just the solenoid?

Before the Kohler starter solenoid replacement, you need to find out if the starter is working fine or not. In case it is having trouble then you must get the whole thing replaced. However, if only the solenoid is facing a problem, repair/replacement of that part alone should help.

How long does it take to replace a starter solenoid?

It will take somewhere between 2 to 4 hours for a typical scene. However, that’s a varying process. So there’s no exact answer to the time needed for the whole replacement.

Can a starter solenoid drain a battery?

Yes, when a starter solenoid gets bad it will drain the battery faster. And that will also compromise the remaining system’s integrity.

Wrapping Up

Now you’ve got the Kohler starter solenoid wiring diagram with its explanation as well as some common signs of identifying the part gone bad. We also tried answering the most commonly asked questions on this matter.

Hope everything, on the whole, will be helpful for you. On that note, we will be leaving for today! Take Care.

You Can Also Read:

Was it helpful?

Thanks for your feedback!

You may also like

Leave a Comment

About Us

Inside The Yard is your go-to source for all things lawn and garden, offering expert advice for every corner of your outdoor space, from tractor troubleshooting to the best rose-planting tips, all wrapped up in the nation’s fastest-growing garden blog.

Latest Articles