Using an adjustable gasoline high pressure washer involves the following steps:

Familiarize yourself with the machine: Before starting to use the pressure washer, read the user manual and familiarize yourself with the various parts of the machine.

Prepare the machine: Check the oil and fuel levels and make sure that the spark plug is clean and properly connected. Also, attach the high-pressure hose to the pressure washer.

Connect the water source: Connect a garden hose to the pressure washer and turn on the water supply. Make sure that the water is flowing freely from the nozzle.

Adjust the pressure: Adjust the pressure regulator knob to the desired pressure level. Start with the lowest pressure setting and gradually increase it until you achieve the desired pressure.

Start the engine: Pull the starter cord to start the engine. Allow the engine to warm up for a few minutes.

Begin washing: With the pressure washer running, direct the spray nozzle at the surface you want to clean. Move the nozzle in a sweeping motion, keeping a safe distance from the surface to avoid damage.

Adjust the pressure as needed: Depending on the surface you are cleaning, you may need to adjust the pressure to avoid damage. For example, you may need to use a lower pressure setting on delicate surfaces like wood or paint.

Turn off the engine: Once you have finished using the pressure washer, turn off the engine and disconnect the hoses.

Store the machine: Drain any remaining water from the machine and store it in a dry, well-ventilated area.