5 Common Kohler Command Pro 27 Problems(With Solutions)

In the realm of small engines, the Kohler Command Pro 27 is a popular choice for a wide range of applications. From powering lawn mowers to generators, this engine is renowned for its reliability and performance.

However, like any piece of machinery, it’s not immune to issues.

In this comprehensive guide, we will explore common Kohler Command Pro 27 problems and provide practical solutions to keep your engine running smoothly.

Let’s jump in.

Kohler Command Pro 27 Problems

Kohler Command Pro 27 Problems

1. Engine Starting Issues

Spark plug problems

One of the primary reasons for engine starting problems is a faulty spark plug. Over time, spark plugs can become fouled or worn out, hindering the ignition process.

To resolve this, simply replace the spark plug with a new one recommended by Kohler.

Fuel delivery troubles

Inadequate fuel supplies can cause starting issues. Check the fuel lines, filters, and carburetor for any blockages or clogs.

Clean or replace them as needed to ensure proper fuel delivery.

Battery Concerns

A weak or dead battery can also be a culprit. Ensure your battery is in good condition, fully charged, and securely connected. If not, consider replacing it.

Read Kohler Engine Starving for Fuel(5 Quick Ways To Fix)

2. Performance problems

Engine Overheating

Engine overheating can be caused by various factors, including a clogged cooling system or low coolant levels.

Regularly check and clean the cooling system components and maintain the recommended coolant level to prevent overheating.

Loss of power

If your Kohler Command Pro 27 experiences a loss of power, it might be due to a dirty air filter, a worn-out spark plug, or a malfunctioning governor.

Inspect and replace these components as necessary to restore engine power.

3. Exhaust and Emission Troubles

Smoke and exhaust issues

Excessive smoke or unusual exhaust emissions can indicate problems with the engine’s combustion process.

Check for issues such as a dirty air filter, an improper fuel-to-air ratio, or worn-out piston rings. Address these problems promptly to maintain emissions compliance.

Emission Control Problems

Kohler engines are designed to meet emission standards. If your engine fails an emissions test, consult a professional technician to diagnose and resolve the issue, ensuring compliance with local regulations.

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4. Oil and Lubrication Challenges

Oil Leaks

Oil leaks can be detrimental to engine performance. Inspect the engine for oil leaks and tighten any loose connections or replace damaged gaskets to prevent oil seepage.

Oil Contamination

Contaminated oil can lead to engine damage. Change the oil and filter at regular intervals according to Kohler’s recommendations to maintain optimal lubrication.

Read Kohler Engine Spewing Liquid out of Breather(Solved)

Maintenance Tips for Kohler Command Pro 27

To avoid these problems, follow the regular maintenance schedule outlined in your engine’s manual.

This will ensure the longevity and reliability of your Kohler Command Pro 27.

Kohler Command Pro 27 won’t start

1. Fuel System Check

Fuel Level: Ensure there’s enough fuel in the tank. Sometimes, it’s as simple as running out of gas.

Fuel Quality: Check if the fuel is stale or contaminated. Old or bad fuel can cause starting issues. Drain and replace the fuel if necessary.

Fuel Valve: Ensure that the fuel valve is open. Some engines have a fuel shut-off valve that needs to be in the “on” position.

Fuel Filter: A clogged fuel filter can restrict fuel flow. Check and replace the fuel filter if it’s dirty or old.

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2. Ignition System Inspection

Spark Plug: Examine the spark plug for signs of fouling or wear. Replace the spark plug if it’s in poor condition. Also, ensure it’s properly gapped according to your engine’s manual.

Spark Arrestor: A clogged spark arrestor can restrict exhaust flow, affecting engine performance. Clean it or replace it if needed.

Ignition Switch: Make sure the ignition switch is in the “on” position.

3. Air Intake and Filtration

Air Filter: A dirty or clogged air filter can impede air intake, affecting combustion. Inspect and clean or replace the air filter as necessary.

Choke: If your engine has a choke, ensure it’s set correctly. Consult your manual for the appropriate choke position for starting.

4. Battery condition

If your engine has an electric starter, check the battery’s condition. A weak or dead battery can prevent the engine from starting. Charge the battery or replace it if needed.

5. Safety Features

Some engines have safety features like a seat switch or a parking brake interlock that must be engaged for the engine to start. Ensure all safety features are in the correct position.

6. Starter Motor

If you hear a clicking sound when you turn the key, it might indicate a problem with the starter motor. Check the battery connections and starter motor connections for tightness and corrosion.

Read Kohler Engine Dies After 30 Minutes(7 Quick Ways To Fix)

7. Compression Check

If all else fails, consider performing a compression test. Low compression can prevent an engine from starting and may indicate a more serious internal issue.

Troubleshoot your Kohler Command Pro Engine

ProblemPossible CausesTroubleshooting Steps
Engine Won’t Start– Empty fuel tank – Bad fuel quality – Closed fuel valve – Clogged fuel filter – Faulty spark plug – Clogged spark arrestor – Ignition switch off – Choke not set properly – Weak or dead battery – Safety features not engaged– Check and fill the fuel tank – Replace or clean the fuel – Open the fuel valve – Replace fuel filter – Inspect and replace spark plug – Clean or replace spark arrestor – Turn on the ignition switch – Set the choke to the correct position – Charge or replace the battery – Ensure all safety features are engaged
Engine Overheating– Low coolant level – Clogged cooling system – Cooling fan not working – Damaged or worn-out water pump– Check and top up coolant – Clean the cooling system – Inspect and repair or replace the cooling fan – Replace the water pump if necessary
Loss of Power– Dirty air filter – Fouled spark plug – Malfunctioning governor– Clean or replace the air filter – Replace the spark plug – Inspect and repair or replace the governor
Excessive Smoke or Unusual Emissions– Dirty air filter – Improper fuel-to-air ratio – Worn-out piston rings– Clean or replace the air filter – Adjust the fuel-to-air ratio – Inspect and replace piston rings if needed
Oil Leaks– Loose connections – Damaged gaskets– Tighten loose connections – Replace damaged gaskets
Oil Contamination– Old or contaminated oil – Dirty oil filter– Change the oil and filter at recommended intervals
Engine Vibrations– Loose or damaged engine components– Inspect and tighten loose components – Replace damaged parts as necessary
Irregular Idling– Dirty carburetor – Maladjusted throttle or choke– Clean the carburetor – Adjust the throttle and choke settings
Excessive Fuel Consumption– Clogged air filter – Fuel system issues– Replace or clean the air filter – Inspect and repair the fuel system as needed

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Final Remarks

The Kohler Command Pro 27 is a robust and dependable engine, but issues can arise over time.

By addressing these common problems and following a diligent maintenance routine, you can keep your engine running smoothly for years to come.


How often should I change the spark plug in my Kohler Command Pro 27?

It’s recommended to change the spark plug every 100 hours of operation or annually, whichever comes first.

What type of oil should I use in my engine?

Consult your engine’s manual for the recommended oil type. Typically, Kohler engines perform well with high-quality SAE 10W-30 oil.

Can I use ethanol-blended fuel in my engine?

Kohler recommends using ethanol-free gasoline with an octane rating of 87 or higher to prevent fuel-related issues.

How can I prevent overheating in my engine during hot weather?

Ensure the cooling system is clean and well-maintained, and maintain the proper coolant level. Additionally, avoid running the engine under heavy loads for extended periods in high temperatures.

Where can I find replacement parts for my Kohler Command Pro 27 engine?

You can purchase genuine Kohler replacement parts from authorized dealers, online retailers, or directly from the Kohler website.

Read Kohler Engine Spewing Liquid out of Breather(Solved)

George Bill
George Bill

George Bill is a Mechanical Engineer by Profession and an avid gardener and has been mowing his lawn for over 20 years. He has used a variety of different mowers during this time.
George is an expert at maintaining his mowers and over the years, he has learned many tricks and techniques for getting the best results from his mowers and is always happy to share his knowledge on this site.