Keeping your pressure washer in tip-top shape is crucial for efficient cleaning and a long lifespan. And at the heart of most pressure washers is the engine – often a reliable Kohler. Neglecting its maintenance can lead to decreased performance, costly repairs, and even complete engine failure.

This guide provides a comprehensive DIY maintenance schedule tailored for Kohler engines commonly found in pressure washers. We'll cover everything from the basics to more involved procedures, empowering you to keep your engine running smoothly for years to come.

Why DIY Maintenance?

While professional servicing is always an option, performing regular maintenance yourself offers several advantages:

• Cost Savings: You'll save significantly on labor costs.
• Convenience: No need to haul your pressure washer to a shop. You can work at your own pace.
• Familiarity: You'll gain a deeper understanding of your engine's operation, making troubleshooting easier.
• Preventative Care: Regular maintenance prevents small issues from becoming major problems.

"If you're looking for parts for your Kohler Pressure Washer, give me a call at 765-287-3406! I'll help you find the maintenance items you need." 

- Jonathan Snyder, Parts Salesmen at Small Enigne Warehouse

Safety First!

Before diving into any maintenance task, PRIORITIZE SAFETY!

• Disconnect the Spark Plug Wire: This prevents accidental starts while you're working. Make sure it's firmly disconnected and tucked away from the spark plug.
• Allow the Engine to Cool: Never work on a hot engine. Let it cool completely to avoid burns.
• Drain Fuel in a Well-Ventilated Area: Gasoline fumes are flammable and hazardous. Work outdoors or in a well-ventilated space.
• Wear Safety Glasses: Protect your eyes from debris.
• Use Appropriate Tools: Using the right tools prevents damage to the engine and ensures your safety.
• Consult Your Owner's Manual: Your Kohler engine's owner's manual is the ultimate guide. Refer to it for specific instructions and warnings related to your model.

The Maintenance Schedule: A Step-by-Step Guide

This schedule is a general guideline. ALWAYS refer to your Kohler engine's owner's manual for specific recommendations. The frequency of these tasks depends on your usage. If you use your pressure washer frequently (e.g., weekly), you'll need to perform these tasks more often.

Daily/Pre-Use (Before Each Use)

• Check Engine Oil Level: This is the most important daily check. Low oil is a major cause of engine damage.
  • How to Check: Locate the oil dipstick (usually marked). Clean the dipstick, reinsert it fully, and then remove it again. The oil level should be between the "Min" and "Max" marks on the dipstick.
  • If Low: Add the recommended oil type (see your owner's manual) until the level is correct. Do not overfill.
• Check Air Filter: A clean air filter is essential for efficient engine operation.
  • How to Check: Locate the air filter housing. Remove the cover and inspect the filter element.
  • If Dirty: Clean or replace the filter (see below). If heavily soiled, replace it.
• Check Fuel Level: Ensure you have enough fuel for the task at hand.
  • How to Check: Visually inspect the fuel level in the fuel tank.
  • If Low: Refill with fresh, unleaded gasoline with an octane rating of 87 or higher. Consider using fuel stabilizer, especially if the pressure washer will be stored for an extended period.
• Inspect Hoses and Connections: Check for leaks or damage to fuel lines, water hoses, and fittings.
  • How to Check: Visually inspect all hoses and connections for cracks, leaks, or loose fittings.
  • If Problems Found: Tighten loose fittings. Replace damaged hoses immediately.

Every 25 Hours or Seasonally (Whichever Comes First)

• Change Engine Oil: Regular oil changes are vital for engine longevity.
  • Materials Needed: New engine oil (refer to your owner's manual for the correct type and quantity), oil filter wrench (if applicable, some models have spin-on filters), drain pan, funnel, rags.
  • How to Change: Warm the engine slightly (a few minutes of operation). Do not run it until hot. Locate the oil drain plug (usually at the bottom of the engine). Place the drain pan under the drain plug. Remove the drain plug and allow the oil to drain completely. Reinstall the drain plug securely. If your engine has an oil filter, remove the old filter using an oil filter wrench. Lightly lubricate the rubber gasket of the new filter with fresh oil and install it hand-tight (follow the instructions on the filter). Remove the oil fill cap. Pour in the correct amount of new oil using a funnel. Replace the oil fill cap. Check the oil level with the dipstick and add more oil if needed. Start the engine and let it run for a few minutes, checking for leaks around the drain plug and oil filter. Turn off the engine and recheck the oil level. Dispose of the used oil properly at a recycling center.
• Clean Air Filter: A dirty air filter restricts airflow and reduces engine performance.
  • Materials Needed: Compressed air (low pressure), mild soap and water (if cleaning a foam filter), clean rags, new air filter (if necessary).
  • How to Clean: Remove the air filter from its housing. Paper Filter: Tap the filter gently to remove loose dirt. Blow it out with compressed air from the inside out. Do not wash a paper filter. Replace if heavily soiled. Foam Filter: Wash the filter in warm, soapy water. Rinse thoroughly and allow it to air dry completely. Lightly oil the filter with air filter oil before reinstalling. Clean the air filter housing before reinstalling the filter.
• Check and Clean Spark Plug: A clean spark plug ensures proper ignition.
  • Materials Needed: Spark plug wrench, wire brush, spark plug gap tool, new spark plug (if necessary).
  • How to Check and Clean: Disconnect the spark plug wire. Remove the spark plug using a spark plug wrench. Inspect the spark plug for wear, damage, or carbon buildup. Clean the spark plug with a wire brush. Check the spark plug gap using a spark plug gap tool and adjust if necessary (refer to your owner's manual for the correct gap). If the spark plug is heavily worn or damaged, replace it. Reinstall the spark plug and tighten it securely. Reconnect the spark plug wire.

Every 50 Hours or Annually (Whichever Comes First)

• Clean Carburetor (If Necessary): If the engine is running rough, idling poorly, or stalling, the carburetor may need cleaning. This is a more advanced procedure.
  • Important Note: Carburetor cleaning can be complex. If you're not comfortable with this task, it's best to take your pressure washer to a qualified technician.
  • Materials Needed: Carburetor cleaner, small brushes, screwdrivers, pliers, safety glasses, gloves.
  • How to Clean (General Steps - Refer to Your Owner's Manual for Specific Instructions): Disconnect the fuel line from the carburetor. Remove the carburetor from the engine. Carefully disassemble the carburetor, noting the position of all parts. Clean all carburetor parts with carburetor cleaner and small brushes. Pay particular attention to the jets. Reassemble the carburetor. Reinstall the carburetor on the engine. Reconnect the fuel line. Start the engine and adjust the carburetor settings if necessary.
• Inspect and Clean Cooling Fins: The cooling fins on the engine cylinder head help dissipate heat. Keep them clean to prevent overheating.
• • How to Clean: Use a brush or compressed air to remove dirt and debris from the cooling fins.
• Check and Adjust Valve Clearance (If Applicable): Some Kohler engines require periodic valve clearance adjustments. Refer to your owner's manual for specific instructions. This is a more advanced procedure.

End-of-Season Storage

Proper storage is crucial to prevent damage during the off-season.

• Drain Fuel: Fuel left in the tank can degrade and gum up the carburetor.
  • Drain the fuel tank completely.
  • Run the engine until it stalls to empty the carburetor.
  • Alternatively, add fuel stabilizer to the fuel tank according to the manufacturer's instructions.
• Change Engine Oil: Fresh oil protects the engine during storage.
• Remove Spark Plug and Add Oil to Cylinder: This protects the cylinder wall from corrosion.
  • Remove the spark plug.
  • Pour a small amount of engine oil (about a tablespoon) into the cylinder.
  • Slowly pull the starter cord a few times to distribute the oil.
  • Reinstall the spark plug.
• Clean the Pressure Washer: Remove dirt and debris from the entire unit.
• Store in a Dry Place: Protect the pressure washer from the elements.

Troubleshooting

• Engine Won't Start: Check fuel level, spark plug, air filter, and engine oil level.
• Engine Runs Rough: Check spark plug, air filter, carburetor, and fuel quality.
• Low Power: Check air filter, spark plug, and engine oil level.

Final Thoughts

Regular maintenance is the key to keeping your Kohler-powered pressure washer running reliably. By following this DIY maintenance schedule and consulting your owner's manual, you can extend the life of your engine and enjoy years of trouble-free cleaning. Remember to prioritize safety and don't hesitate to seek professional help if you're unsure about any procedure. Happy cleaning!