There are several reasons why your pressure washer might start then shut off. Here are a few common culprits:
1. Low Fuel
Your pressure washer might be simply running out of fuel. This is a straightforward issue that can be easily resolved by refilling the tank.
2. Clogged Fuel Filter
A clogged fuel filter can restrict the flow of fuel to the engine, causing it to stall. Check the filter and replace it if necessary.
3. Air in the Fuel Line
Air in the fuel line can interrupt the fuel flow to the engine, leading to a sudden shutdown. You can try bleeding the fuel line to remove the air bubbles.
4. Faulty Spark Plug
A worn-out or fouled spark plug can prevent the engine from igniting properly. Inspect the spark plug and replace it if necessary.
5. Problems with the Unloader Valve
The unloader valve controls the pressure in the system. A faulty unloader valve can cause the pressure to build up excessively, leading to the engine shutting down as a safety mechanism.
6. Low Oil Level
Your pressure washer's engine requires oil for lubrication. A low oil level can cause the engine to overheat and shut down. Check the oil level and top it off if necessary.
7. Overheating
If the engine is overheating, it might shut off as a safety precaution. Ensure proper airflow around the engine and check for any blockages in the cooling system.
8. Electrical Issues
A problem with the electrical system, such as a faulty ignition coil or wiring, can prevent the engine from starting or running properly.
By addressing these potential issues, you can troubleshoot why your pressure washer is starting then shutting off.
