Ensure the fuel tank has enough petrol and the ignition switch is turned on. Check the choke position for starting and inspect the spark plug for fouling or wear. If the pull cord feels stuck, check for engine seizing or a blockage in the pump.

Inspect the nozzle for clogs or wear. Check the inlet filter and water supply for blockages or airlocks. Ensure the hose connections are tight and that there are no leaks in the system.

This could be caused by low fuel, overheating, or a clogged air filter. Check fuel levels and ensure the machine is well-ventilated. Clean or replace the air filter if it’s dirty.

Inspect the unloader valve for sticking or damage. Check for air trapped in the pump and bleed it by running the machine without the nozzle for a few seconds.

Inspect all hose connections and seals for tightness. Check for damaged O-rings or cracks in the pump housing and replace any worn components.

Excessive vibration can occur if fittings are loose, the pump is running dry, or there’s air in the system. Tighten connections, ensure adequate water flow, and bleed the pump if necessary.

Ensure the detergent tank is filled and the valve is open. Verify that the nozzle in use supports detergent application. Check the detergent suction tube for clogs or damage

Turn off the machine and allow it to cool down. Ensure it’s placed in a well-ventilated area, and check that the cooling vents and air filter are clean and free from debris.