John-Deere pressure washers are known for their heavy-duty applications, making them a preferred choice for commercial cleaning. Despite their reliable built, it is normal for all pressure washers (gas-powered or electric) to occasionally face difficulty in starting, particularly if they aren’t maintained properly. In some cases, the engine could leak oil, or the electric motor could produce a buzzing sound.
John-Deere Pressure Washer Problems: Engine/Motor Troubleshooting & Repair
If a gas-powered John Deere pressure washer doesn’t start, look for debris deposits in the air, fuel filters, and carburetor jets. Check for a vapor lock in the gasoline lines and ensure the fuel tank vents are not clogged with dirt. If your John Deere electric pressure washer doesn’t start, you should begin by checking the voltage, power supply, and fuses. Check for a bad capacitor, a malfunctioning pump, or a pressure buildup in the system if the motor produces a buzzing sound.
The following section of this blog lists all possible issues that can occur with a John-Deere gas or electric pressure washer. In addition to the problems, the specific steps for troubleshooting the root cause are also mentioned. Make sure you scroll down to read in detail.
Contents
- 1 Problems with the John-Deere Gas Pressure Washer Engine
- 1.1 ● 1. John-Deere Pressure Washer: Keeps Stopping and Starting
- 1.2 ● 2. John-Deere Pressure Washer: The Engine won’t run
- 1.3 ● 3. John-Deere Pressure Washer: Engine Stops
- 1.4 ● 4. John-Deere Pressure Washer: Engine not providing enough Power
- 1.5 ● 5. John-Deere Pressure Washer: Oil Leak
- 1.6 ● 6. John-Deere Pressure Washer: Water in Oil
- 2 John-Deere Electric Pressure Washer Problems
- 3 John-Deere Pressure Washer troubleshooting table:
Problems with the John-Deere Gas Pressure Washer Engine
A four-stroke gas engine drives the pump on the John Deere gas pressure washer. The engine and its accompanying fuel system components (carburetors, filters, and fuel lines) add to the system’s complexity and maintenance requirements. As a result, gas-powered pressure washers sometimes need more maintenance than their electric-powered equivalents.
Some common issues with John-Deere pressure washer engines include:
● 1. John-Deere Pressure Washer: Keeps Stopping and Starting
If your pressure washer starts and stops often, the problem might be a clogged carburetor jet or a vapor lock in the fuel lines. A blocked fuel filter might sometimes cause a similar problem.
Most engine problems caused by pressure washers are due to old fuel deposits clogging the carburetor jets. As a result, the quantity of fuel that reaches the engine hampers combustion, resulting in the engine’s power reduction.
A vapor lock, in addition to a clogged carburetor or filter, could be the source of the problem. A vapor lock is often caused by an obstruction in the fuel tank vents, which produces a continuous accumulation of gasoline vapors in the fuel lines, affecting the fuel delivery to the engine.
– How to Fix?
To resolve this issue, clean the jets of your carburetor with WD-40 or a carburetor cleaning solution. Ensure that all flow channels have been thoroughly cleaned, including the bowl’s nut, which also serves as a jet. In addition to cleaning the carburetor, you should examine and, if required, replace the fuel filter. In addition to this, I also recommend cleaning the fuel tank vents to prevent vapor collection and vapor lock.
● 2. John-Deere Pressure Washer: The Engine won’t run
If your engine doesn’t start, ensure the spark plug is in good working condition. If the issue continues, remove the carburetor and clean the ports using a liquid carburetor cleaner.
Over time, carbon deposits degrade spark plug electrodes, lowering spark quality and making engine starting more difficult.
– How to Repair?
The spark plug must be removed to inspect the electrodes. If the electrodes are damaged, you should replace the plug. If the issue persists, try cleaning the pressure washer’s carburetor. Detach the carburetor from the pressure washer and thoroughly clean it to remove any fuel residue. I recommend purchasing a carburetor repair kit with a cleaning solution to remove sticky deposits.
● 3. John-Deere Pressure Washer: Engine Stops
If your engine stops after just a few minutes of usage, examine and thoroughly clean the air and fuel filters. You must also examine the fuel tank for vapor lock and ensure that the carburetor is clean and properly tuned.
Impurities are kept out of the carburetor by using air and fuel filters. As a result, dirt accumulates in these filters, upsetting the air-fuel ratio and reducing engine performance. Examine these filters to determine the cause of the problem and, if necessary, clean or replace them. If the issue continues, inspect the fuel tank vents for vapor lock and adjust the carburetor screws.
● 4. John-Deere Pressure Washer: Engine not providing enough Power
If your pressure washer isn’t producing enough pressure, ensure the water supply is enough and the hoses aren’t twisted.
The air-fuel ratio could be too high if the engine isn’t generating enough power. This means that the engine receives too much fuel and not enough air to produce optimum power after combustion. The issue might be with the carburetor, filters, or both.
– How to Repair?
Examine and thoroughly clean the air filter to ensure proper airflow. Furthermore, the carburetor’s L and H screws must be correctly adjusted since they influence the engine’s low and high RPMs.
Furthermore, ensure no air is trapped in the pump and that the hoses are not twisted since this might cause the engine to face substantial back pressure. As a result, the power output may drop.
● 5. John-Deere Pressure Washer: Oil Leak
A worn seal is the most prevalent source of engine oil leaks. Typically, replacing the seal would resolve the problem. An overfilled oil tank could also seem like leaking oil at times.
You may purchase an oil seal kit to help replace different seals. All oil inlets on your engine are usually fitted with oil seals and are placed on both sides of the engine.
– How to Repair?
Remove the seal with a screwdriver and evaluate its condition. It should be changed if it shows indications of wear. Overfilling your oil tank should be avoided as a general precaution since this may cause oil to flow out of these inlets.
● 6. John-Deere Pressure Washer: Water in Oil
The presence of water in engine oil indicates a faulty oil seal. In this instance, you should replace the seal as directed by the manufacturer.
When water and oil are mixed, they form a milky combination. One probable cause is a failed oil seal, and another less frequent cause is a piston that has experienced extreme fatigue. Because of mechanical wear, piston metal chips off with time, increasing the space between the piston and the cylinder walls.
As a result, water from the intake manifold may enter the crankcase and combine with the oil to form a milky suspension.
– Possible solutions:
The seals and gaskets in your engine are vulnerable to damage. In this case, the engine seal/head gasket must be replaced. If your engine is still under warranty, contact the manufacturer to arrange replacements. I would not suggest replacing your seals/gaskets on your own since it would void your warranty. If the warranty on your engine has expired, a professional may be able to repair the seals.
If the piston is worn, check with the manufacturer to determine if the engine is still covered under warranty. If this is not the case, your pressure washer’s engine will stop working after a certain period, and you will need to buy a new pressure washer as this one cannot be repaired.
John-Deere Electric Pressure Washer Problems
Electric pressure washers are less difficult to maintain than their gas-powered counterparts, and the electric motor and battery simplify the design and lower the machine’s maintenance needs. As a consequence, failure risk and noise are considerably reduced, as are harmful emissions. Due to these reasons, the market demand for these pressure washers has significantly increased.
The second part of this blog article focuses on challenges unique to electric pressure washers. The most typical issue with electric pressure washer motors is that they either do not start or quit abruptly. The motor may sometimes hum without generating power.
● John-Deere Electric Pressure Washer not running
If an electric pressure washer won’t start, check the fuse and ensure the electrical socket is working. If the machine remains nonfunctional, the electric motor could be defective.
Check the following if your pressure washer’s motor is not running:
– Step 1: Inspect the electrical outlet
If your electric pressure washer isn’t working, check the outlet. Remove the washer’s cable and use a voltage tester to examine the outlet. Push the reset button if the pressure washer does not start. If the issue continues, check the fuse box circuit breaker.
– Step 2: Examine the Fault Circuit Interrupter
A voltage drop might have triggered the ground fault circuit interrupter (GFCI). Reset the GFCI after unplugging the pressure washer. Allow your pressure washer to dry before reattaching it if it is wet in case it turns on when connected. Perform the following step if the pressure washer does not start after drying.
– Step 3: Examine the Extension Cable
Remove the extension cord from your pressure washer and connect it to a power outlet. Check that the plug is correctly inserted into the socket. The extension cable is most likely to blame if the issue is fixed.
– Step 4: Examine the Fuse
Check the fuse in the machine or the fuse in the socket if the electrical outlet is operational (with a light or other device plugged in), but the machine doesn’t start. If you can’t locate the fuse, see the owner’s handbook. Replace the blown fuse to get the motor working again.
– Step 5: Examine the power line
If the pressure washer continues to be inoperable, the power line may be faulty. This problem might be rectified by changing the power cable. However, you must first determine if the warranty on your pressure washer is still valid. If you cannot change the cable yourself, ask a professional for help.
– Step 6: Inspect the capacitor
A malfunctioning capacitor causes the engine of a pressure washer to make a buzzing sound. If this is the case, you may replace the capacitor yourself. If you lack the necessary experience, you should seek professional assistance. If the pressure washer’s motor does not start following the procedures mentioned above, we may presume that the motor has failed and must be fixed or replaced by the manufacturer.
● John-Deere Electric Pressure Washer Motor Stops
A faulty socket or capacitor is the most common cause of a pressure washer motor not working. A voltage drop in the main plug may sometimes cause the machine to shut off.
The motor stops when the voltage falls below a specified threshold. To verify this, use a multimeter to measure the voltage in the socket. The voltage requirements for pressure washers vary depending on location. Most pressure washers are powered by voltages ranging from 140V to 240V.
If the voltage is enough yet the machine does not power on, the capacitor may need to be changed. This is established when the engine makes a buzzing sound. After replacing the capacitor, the pressure washer must be restarted. If your pressure washer doesn’t start, contact the manufacturer to have the faulty electric motor repaired or replaced.
● John-Deere Electric Pressure Washer Motor Makes a Buzzing Noise
A buzzing noise emerging from the motor of an electric pressure washer indicates a defective capacitor or a high-pressure buildup in the system. The pump could also be damaged in this scenario.
- Capacitor: A defective capacitor is the most probable cause of the motor humming. Motor RPMs are reduced when charge storage is insufficient. You should try replacing the capacitor to see if the buzzing stops.
- Low Voltage: If the input voltage is below the operational range of the pressure washer, the motor may not run at the right RPMs and may buzz.
- Pressure Buildup: When the spray gun is not in use, the water pressure in the hoses rises. Due to the increased back pressure, the pump and motor rotational speed is reduced. Push the spray gun’s release button to reduce engine pressure.
- Pump damage: If pressure washer pumps are not properly maintained, they might fail and cause engine overheating due to inadequate pump pressure. To maintain long-term performance, make sure your pump is timely lubricated.
John-Deere Pressure Washer troubleshooting table:
Problem | Cause | Solution |
The pressure washer is not producing high pressure | Hose with small diameter | Replace your hose with a 1″ (25mm) or 5/8″ (16mm) hose |
Restricted water supply to the washer | Check for the kinks and leaks in the hose | |
Inadequate water supply | Ensure the water source is unobstructed and fully turned on | |
Clogged intake filter | Remove the filter and rinse it with warm water | |
Air in the pump | Ensure that the hose and fittings are airtight. Shut off the washer and squeeze the trigger until water flows steadily from the spray tip | |
The suction tube or detergent bottle is not connected properly | Install the suction tube and detergent bottle correctly | |
Detergent too thick | Dilute the thick detergent by adding water | |
Obstructed spray tip | Remove the debris with a needle | |
No pressure tip on the wand | Install a suitable pressure tip at the end of the wand | |
If your model has a belt, it can be loose. | Tighten or replace the belt. |
Problem | Cause | Solution |
Pulsing pressure washer (output pressure varies high and low) | Inadequate water supply | Ensure that the water source is fully on and check the hose for kinks and blockage |
Obstructed spray tip | Remove the debris with a needle | |
Pump sucking air | Ensure that the hose and fittings are airtight. Shut off the washer and squeeze the trigger until water flows steadily from the spray tip | |
Clogged intake filter | Remove the filter and rinse it with warm water | |
Calcified hose, tip, or trigger | Clean the hose, pressure tip, or trigger with vinegar or a cleaner designed for this purpose |
Problem | Cause | Solution |
Noisy Pump | Air in the pump | Ensure that the hose and fittings are airtight. Shut off the washer and squeeze the trigger until water flows steadily from the spray tip |
Clogged inlet filter | Remove the filter and rinse it with warm water | |
Pump leaking water | Damaged or worn water seals | Replace the seals with new ones or call a professional |
Loose fittings | Ensure that all the fittings are tight | |
Erratic water pressure, changing up and down | Unloader valve | Check and clean the unloader valve. If in bad shape, replace it |
No output pressure. Or the motor stops when using the trigger (electric models) | Unloader valve | Check and clean the unloader valve. If in bad shape, replace it |
● John-Deere Electric Pressure Washer Motor troubleshooting table:
Problem | Cause | Solution |
The motor won’t start | The power switch is in the “OFF” or “0” state | Turn the power switch “ON” or “1” |
Cord not plugged | Plugin the power cord | |
Damaged, too long, or improper extension cord | Replace the existing cord with a 25′ (7.6m) 14 AWG cord or a 50′ (15m) 12 AWG cord | |
Inadequate power from the electrical outlet | Plug the cord into a different outlet | |
The pressure washer circuit breaker tripped | Please wait for the washer to cool down and restart it | |
The motor buzzes but fails to run | Loss in voltage due to the extension cord | Plug the unit directly into the outlet without an extension cord. If the problem isn’t solved, replace the extension cord |
Low supply voltage | Ensure that only the pressure washer runs on that circuit at the time of use | |
Residual pressure in the system | Shut off the washer and squeeze the trigger to release pressure | |
Residual friction among the internal components | Cut the water supply and turn the machine ON for 2 to 3 seconds. Try it a couple of times or until the motor starts. Don’t let the machine run dry for more than 3 seconds. | |
Unit not used for long periods | I recommend calling a professional for help | |
Motor not working | Faulty Timer | Disconnect the leads from the timer. If your pressure washer doesn’t turn off after the time out, the timer is faulty, and you need to replace it. |
● John-Deere Gas Pressure Washer Engine troubleshooting table:
Problem | Cause | Solution |
Leaks in the spray wand, spray tip, or extension | Damaged or broken O-rings or plastic insert | Replace the worn O-rings or call a professional |
Pressure washer pump dripping oil | Worn or damaged oil seals | Inspect the oil seals and replace them if worn |
No water from the washer outlet | The water supply is off | Turn the water supply ON |
Kink in the hose or faucet not fully open | Remove any kinks and debris from the hose or water lines. Check and fully open the faucet. |
Problem | Cause | Solution |
The motor won’t start | Check the battery | Check if the battery is charged correctly. Charge or replace when in bad condition. Examine the battery terminals for a proper connection. Clean if needed. |
Check the fuel filter | Clean the fuel filter if dirty. In that case, check the gas tank, as this is the most likely culprit. | |
Check the gas supply | Check the fuel level and add if needed. Ensure that the gas can flow to the carburetor. Remove any blockage. | |
Check the Air-filter | Clean the air filter. Replace it when it is in bad condition or it is a paper air filter. | |
Check the carburetor | Remove and clean the carburetor with some carb cleaner. It is also possible to clean it without removing it. | |
Fuel gap blocked | Check that the hole in the fuel cap is open. Clean if needed. | |
The engine is stalling, or starts and stops | Check the carburetor | Remove and clean the carburetor with some carb cleaner. It is also possible to clean it without removing it. |
Air filter | Clean the air filter. Replace it when it is in bad condition or it is a paper air filter. | |
Check for bad gas | Suppose you have old gas, more than a few months old. It can turn bad. Drain and replace the gas. Next time add a fuel stabilizer. |
How can I prevent water from getting into the oil of my pressure washer’s engine?
To prevent water leakage into the oil of your pressure washer’s engine, check the oil seals and ensure they are intact and functioning properly. Regularly inspect and replace worn seals to avoid this issue.
I’ve been having issues with my pressure washer, this gave me some ideas on how to fix it
Glad to hear the post was helpful, Leslie! Don’t hesitate to reach out if you have any more questions or need further assistance.
I didn’t realize how important it is to clean the air and fuel filters regularly, thanks for the heads up
Thanks for reading! Regular maintenance is key to keeping your pressure washer running smoothly. Happy cleaning!
What’s the best way to unclog the fuel lines in a John-Deere pressure washer?
To unclog fuel lines in a John-Deere pressure washer, start by checking carburetor jets, fuel filters, and tank vents. If electric, check voltage and fuses. Clean or replace as needed.
I never knew how to check the spark plug on my pressure washer, this article was very helpful
Thank you, Cathy! I’m glad you found the article helpful. If you have any other questions or need further assistance, feel free to reach out. Happy pressure washing!
I appreciate the tips on maintaining the engine of the pressure washer, very useful
Thank you, Celina! I’m glad you found the engine maintenance tips helpful for your pressure washer. Let me know if you have any other questions.
Super helpful information, especially for someone like me who is new to pressure washers
Thank you, Hunter! I’m glad you found the information helpful as a new pressure washer user. If you have any questions or need more assistance, feel free to reach out. Enjoy your pressure washer experience!
How often should I clean the carburetor on my John-Deere pressure washer?
For best performance, clean the carburetor on your John-Deere pressure washer annually or as needed. Check for fuel blockages and vapor locks for smoother operation.
What are the signs that the seals on the pressure washer’s engine need to be replaced?
Check for oil leaks around the engine and be aware of any buzzing sounds, which can indicate engine issues. Regular maintenance and inspections can help prevent seal replacement.
Very detailed troubleshooting steps, I feel more confident in fixing my pressure washer now
Glad the troubleshooting steps helped! Don’t hesitate to reach out if you need more assistance. Happy pressure washing!
This was so helpful, I had no idea what to do when my pressure washer stopped working
Thank you, Wyatt! I’m glad the information was helpful to you in resolving the issue with your pressure washer. Let me know if you have any other questions!
Can using a different type of fuel affect the performance of the pressure washer?
Different types of fuel can indeed affect the performance of a pressure washer. The wrong fuel type can damage the engine or reduce its efficiency. Always refer to the manufacturer’s recommendations for the best results.
Thank you for the step-by-step guide on troubleshooting pressure washer problems
Thank you for your feedback, Justin. I’m glad you found the troubleshooting guide helpful. Feel free to reach out if you have any more questions.
I didn’t know about vapor lock in pressure washer engines, thanks for the info
Glad to help, Sofia! Remember to keep up with regular maintenance to avoid issues like vapor lock. Happy cleaning!
I’ll make sure to follow these tips to keep my pressure washer running smoothly, thank you for sharing
Thank you, Melissa! I’m glad you found the tips helpful for your John-Deere pressure washer maintenance. Happy cleaning!
I appreciate the detailed troubleshooting steps, it makes it easy to follow
Thank you, Jared! I’m glad you found the troubleshooting steps helpful. Let me know if you have any other questions.
Does the type of water used in the pressure washer affect its performance?
Yes, the type of water used in a pressure washer can affect its performance. Make sure to use clean, fresh water to maintain the integrity of your pressure washer.
Great article, very informative and easy to understand
Thank you, Marilyn! I’m glad you found the article helpful. Let me know if you have any questions about troubleshooting your John Deere pressure washer.
How can I tell if the pressure washer’s engine isn’t getting enough power?
To diagnose insufficient power in your John Deere pressure washer engine, check for clogged air filters, carburetor jets, and fuel lines. Ensure proper fuel delivery and air intake for optimal performance.
Is it normal for the pressure washer to leak oil after long periods of use?
Yes, it is normal for a John-Deere pressure washer to leak oil after long periods of use. The issue might be due to a worn seal or an overfilled oil tank.