Pressure Washer Starts Then Stalls. You are in the middle of a cleaning job and you have a pressure washer that just stopped working.
Don’t worry, there are several things you can check to make sure you get it working again as soon as possible.
Have a look at this checklist to find out what your problem might be and how to fix it.
First, make sure the fuel system isn’t malfunctioning by checking such parts as the fuel cap, fuel filter, and choke. Next, clean the spark arrestor and unloader valve.
Pressure Washer Starts Then Stalls
A clogged carburetor could come from leaving fuel in a pressure washer for too long.
You see, over time the ingredients will evaporate, or separate somewhat which leaves behind a thicker substance that can clog up the fuel system and choke your engine to oblivion.
This article discusses some problems with pressure washers that start, then stall.
Unloader Valve Damaged
Another possible cause for water hammering is a problem with the unloader valve. Essentially, the unloader valve circulates the water around your pump system, which allows you to use the faucet in order to spray out water whenever you need to.
One common cause of leakage and/or bubbling sounds is when the pressure level of this unloader valve gets too high.
In this case, it’s usually due to the fact that it needs to be replaced; however, in other cases, this issue can be solved by simply adjusting specific settings on the venturi lever attached to it.
If you think you have an issue with your underloading pressure valve, we recommend putting in a call to our specialists.
Fuel Filter Clogged
Fuel filters are often clogged with build-up, which can occur when you have a pressure washer that hasn’t been used in quite a while.
When the fuel sits around and builds up over time, it curdles into something thick and sticky which will easily block the fuel filter.
To resolve this issue properly, you first need to siphon out all of the old and deposited fuel from the pressure washer’s fuel tank. Next, you must remove the old fuel filter and replace it with a new one.
Causes Of Spark Arrestors
To make sure a spark arrestor works correctly, you should check it regularly for soot. A spark arrestor is designed to prevent sparks from being emitted during the combustion cycle of an engine.
This small device typically has openings that can become clogged with soot over time. If the opening of the spark arrestor becomes clogged, it might cause your motor to stall.
To fix a clogged spark arrestor, remove it and clean it with a wire brush to ensure the passages are clear and operational. You can also replace the spark arrestor if needed.
Fuel Cap Problem
During the operation of the engine, the fuel level in the tank decreases. An air vent in the tank compensates for this by allowing air into the tank, which forms a cushion.
The engine will not stall if there is a vacuum or “vapor lock” present. If vacuum or vapor lock does occur then try slightly loosening the cap of your fuel tank and then start up your vehicle again.
If loosening the fuel cap allows your engine to stay running, it is likely that it was due to a clogged vent and should be replaced immediately.
Carburetor Malfunction
It is possible that the carburetor is clogged. One of the most common causes of this is leaving fuel in the pressure washer for too long during storage.
Some of the ingredients in the fuel may evaporate over time, leaving behind a thick and syrupy substance. Your engine will be unable to breathe properly and may even stall or run erratically.
When your engine stalls after using your pressure washer, check your gas mixture first.
If cleaning out your carburetor didn’t fix the problem, it’s probably time to rebuild your carburetors or replace them entirely.
Faulty Air Filter
There is a possibility that the air filter is clogged. An engine that does not receive adequate air and too much fuel will suffer from a clogged air filter.
The engine may not run smoothly as a result. If this occurs, it’s important to remember to replace the air filter as soon as possible.
Pressure Washer Starts Then Stalls
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