Fuel Shut-Off: A Standard Feature For Pressure Washers?

Pressure washers are handy tools for cleaning, but they can be a little finicky. One common issue is the machine shutting off unexpectedly, which can happen due to fuel or air obstructions in several areas, such as the fuel cap vent or fuel filter. This can be prevented by using fresh fuel and a fuel stabilizer, and regularly changing the fuel filter. However, if your pressure washer is acting up, it might not be fuel-related at all. Electric pressure washers, for example, might shut off if there's an issue with the power supply or the GFCI has been tripped. Gasoline-powered models generally require more maintenance than electric ones, so it's important to consult your owner's manual for a maintenance schedule and follow safety procedures.

Fuel stabilizers prevent engine corrosion and keep gasoline fresh

Fuel stabilizers are a great way to keep your fuel fresh and your engine in good condition. They are especially useful if you own seasonal equipment, classic cars, or boats that tend to sit idle for extended periods, or if you're storing your vehicle for the winter. Fuel has a short shelf life and can start to spoil after just 30 days, so it's important to take steps to prevent this.

Fuel stabilizers are designed to prevent oxidation in fuel and extend its lifespan. They create a protective layer that bonds with gasoline to prevent evaporation and the formation of sticky resins that can damage your carburetor. On a chemical level, stabilizers are a mixture of antioxidants and lubricants designed to repel water and limit evaporation.

By using a fuel stabilizer, you can keep your fuel fresh, properly balanced, and stable, with no evaporation or left-behind deposits in your engine. This will help to maintain great performance and long-term functionality.

There are a variety of fuel stabilizers available on the market, such as STA-BIL Fuel Stabilizer, Sea Foam SF-16 Motor Treatment, and Berryman Total Fuel Stabilizer. These products can keep your fuel fresh for up to two years and are compatible with most gasoline engines.

To use a fuel stabilizer, follow these steps:

• Ensure your vehicle's fuel tank is nearly empty.
• Measure the recommended amount of stabilizer according to the manufacturer's instructions.
• Pour the stabilizer into the fuel tank.
• Fill up your tank with fuel, preferably ethanol-free gasoline.
• Run the engine for 5-10 minutes to allow the stabilizer to reach the entire fuel system.

Gasoline-powered pressure washers generally require more maintenance than electric models

Gasoline-powered pressure washers are generally more powerful than electric models. They are also more durable, versatile, and can be used virtually anywhere outdoors without the restriction of power cords. However, they require significantly more maintenance than electric pressure washers.

Gasoline-powered pressure washers are powered by an internal combustion engine, which requires regular maintenance. This includes regularly checking fuel and oil levels, winterizing the machine, and keeping the engine and its components in good condition. Gasoline-powered pressure washers also have higher maintenance costs than electric models.

One important aspect of maintaining a gasoline-powered pressure washer is preventing fuel from going stale. Fuel can turn stale in as little as 30 days, leading to moisture contamination in the tank and carburetor. This can be mitigated by stabilising the fuel with a product like Ethanol Shield, or by draining the fuel after each use.

Another important maintenance task for gasoline-powered pressure washers is winterisation. If residual moisture is left in the pump, it can expand in cooler months, causing tiny cracks. To prevent this, the machine must be winterised according to the user manual, and a pump guard should be used in subsequent seasons.

In addition to fuel and moisture management, other components of gasoline-powered pressure washers require regular maintenance. Nozzles should be checked and replaced if worn or broken, and accessories should be within the pressure washer's PSI range. The air filter should also be checked and cleaned or replaced if dirty, as a dirty air filter can restrict airflow to the carburetor and cause the engine to stall.

Overall, while gasoline-powered pressure washers offer more power and versatility, they require significantly more maintenance than electric models. This includes regular fuel and oil checks, winterisation, and maintenance of various components such as nozzles, accessories, and air filters.

Leaving water in the pump can result in mineral buildup and corrosion

Leaving water in the pump of a pressure washer can cause several issues, including mineral buildup and corrosion.

Mineral buildup, or limescale, is a common issue with hard water, which contains high levels of dissolved minerals such as calcium, magnesium, and potassium. When hard water flows through the pipes, it leaves behind traces of these minerals, which can accumulate and clog the pipes. This buildup can also occur inside the pump, especially if the water is allowed to stagnate. Over time, the restricted flow and increased pressure can lead to cracks and breaks in the pipes.

Additionally, if your pressure washer has copper or galvanized steel pipes, the reaction between the water and the pipe material can cause corrosion. Corrosion weakens the pipe walls, reducing their lifespan and increasing the likelihood of pinhole leaks and cracks. Corrosion can also affect the pump, causing similar issues.

To prevent mineral buildup and corrosion in your pressure washer, it is important to regularly flush and clean the system, ensuring that water does not stagnate or dry inside the pump or pipes. You may also consider using a water softener or treatment system to reduce the mineral content of the water. By taking these precautions, you can help extend the lifespan of your pressure washer and maintain its performance.

Small engines run best on low-ethanol or ethanol-free gas

While some pressure washers may shut off due to a fuel or air obstruction, the type of fuel used is also important.

E10 fuels (containing 90% gas and 10% ethanol) are approved for usage in small engines, but they are not recommended. Gas with higher concentrations of ethanol is not approved for small engines. It is recommended to use ethanol-free gas or fuel with a maximum of 10% ethanol in small engines.

To prevent fuel from deteriorating, it is important to stabilise it using a fuel stabiliser. Fuel can begin to deteriorate in as little as 30 days, so it is recommended to purchase fuel in quantities that can be used within this time frame. For equipment that is not used daily, the use of a fuel stabiliser is imperative to prevent issues with fuel degradation.

By using low-ethanol or ethanol-free gas and stabilising fuel, small engines will run more efficiently and experience fewer performance issues.

If your pressure washer is shutting off, there is likely a fuel or air obstruction

Fuel Issues

One of the main reasons your pressure washer may shut off is due to fuel problems. This could be caused by old or stale fuel, an improper fuel mixture, or a clogged fuel filter. If the engine is not receiving enough fuel or if the fuel is contaminated, it can lead to sudden shutdowns. Check the fuel level in the tank and ensure it is filled with fresh, clean fuel. If you suspect stale fuel, drain the tank and refill it. Additionally, clean or replace the fuel filter to ensure a consistent fuel supply to the engine.

Air Filter Problems

A dirty or clogged air filter can also cause your pressure washer to shut off unexpectedly. The air filter prevents dirt, debris, and dust from entering the engine. If it becomes blocked, it can restrict airflow and affect the engine's performance, leading to shutdowns. Locate and remove the air filter cover or housing to access the filter. Inspect the air filter for dirt, debris, or damage. If it is dirty or clogged, clean or replace it. If the filter is made of foam or paper, gently tap it on a hard surface to remove loose dirt and debris, then rinse and dry it.

Spark Plug Troubles

A faulty or fouled spark plug can cause intermittent shutdowns. The spark plug is responsible for igniting the fuel and air mixture in the combustion chamber. If it is not functioning properly, it can result in misfires or a complete loss of engine power. Locate and remove the spark plug wire, then inspect the spark plug for signs of damage, such as worn electrodes or carbon buildup. If the spark plug is damaged or dirty, clean or replace it.

Overheating

Gas pressure washers can overheat if used for extended periods without breaks. Overheating can cause the engine to shut off as a safety measure. Allow for regular cool-down periods and check the cooling system for any dirt, debris, or obstructions that may be blocking airflow. Ensure there is an uninterrupted flow of water to the pressure washer, as gas pressure washers rely on a constant water supply to cool down the engine.

Pump Issues

Problems with the pump can also cause your pressure washer to shut off. This could be due to a faulty pump valve, worn-out seals, or pump cavitation. Inspect the pump for any visible signs of damage or leaks, and check the water supply to ensure it is adequate and uninterrupted. If the pump valve is not functioning correctly, it may need to be repaired or replaced. Consult a professional if you suspect worn-out seals or cavitation.

Frequently asked questions