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HomeRepair HelpMTD Pressure Washer RepairMTD Pressure washer starts then stalls Repair
MTD Pressure washer starts then stalls
If your MTD pressure washer starts then stalls, the carburetor is the most likely cause. Stale or ethanol-blended fuel left in the carburetor during seasonal storage can evaporate and leave a sticky residue that blocks fuel passages. Clean the carburetor with carburetor cleaner, then rebuild or replace it if cleaning does not restore steady operation. A carburetor repair kit may provide the gaskets, needle valve, and other parts needed for a rebuild. Next, check the fuel filter, especially if old fuel remained in the tank, and replace it after draining the tank. A clogged fuel cap vent can also restrict fuel flow by creating a vacuum in the tank. If loosening the cap slightly lets the engine keep running, replace the fuel cap. A clogged air filter can limit airflow and cause the engine to flood and stop, so replace it as needed. A blocked pre-cleaner is possible but less common. These repairs address common problems when a pressure washer starts then dies, starts and stops, or will not stay running. Enter your MTD pressure washer model number to find the exact replacement part for your machine.
01 - MTD Pressure Washer Carburetor
The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the pressure washer for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to run stall. If the carburetor is clogged, try cleaning it with carburetor cleaner. If cleaning the carburetor isn’t effective, rebuild or replace the entire carburetor.
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02 - MTD Pressure Washer Carburetor Repair Kit
The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the pressure washer for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to run stall. If the carburetor is clogged, try cleaning it with carburetor cleaner. If cleaning the carburetor isn’t effective, rebuild or replace the entire carburetor.
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03 - MTD Pressure Washer Fuel Filter
The fuel filter might be clogged. A clogged fuel filter is most commonly caused by leaving fuel in the pressure washer for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the fuel filter and cause the engine to stall. If old fuel was left in the pressure washer, drain the old fuel from the fuel tank and replace the fuel filter
Highly Likely
04 - MTD Pressure Washer Fuel Cap
As fuel is consumed by the engine, the level in the fuel tank lowers. To make up for this, the fuel cap uses a small vent to allow air to enter the tank. If the fuel cap vent is clogged, air won’t be able to enter the tank and a vacuum or “vapor lock” will occur. This stops the flow of fuel to the carburetor causing the engine to stall. To determine if the fuel cap vent is clogged, try slightly loosening the cap and then starting the engine. If loosening the fuel cap allows the engine to stay running it is likely clogged and will need to be replaced.
Highly Likely
05 - MTD Pressure Washer Air Filter
The air filter may be clogged. If the air filter is clogged, the engine will get too much fuel and not enough air. As a result, the engine may stall. If the air filter is clogged, replace it.
Highly Likely
06 - MTD Pressure Washer Pre-Cleaner
The pre-cleaner might be clogged. However, this is rare.
Highly Likely
Frequently Asked Questions
Why does my MTD pressure washer start then stall?
Can a clogged fuel cap make a pressure washer start and stop?
Could the air filter cause my pressure washer to start and then die?
How do I find the correct MTD pressure washer carburetor or fuel filter?
What should I check before replacing the complete carburetor on a pressure washer that won't stay running?
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