Stihl RB 400 Instruction Manual
![Stihl RB 400 manual cover](/images/907aaa61996bbdad463d57ee/thumbs/thumb175x175.webp)
The Stihl RB 400 pressure washer requires unleaded gasoline with a minimum octane rating of 87. It is recommended to use fresh fuel with no more than 10% ethanol content.
To start the Stihl RB 400, ensure the fuel valve is open, turn the engine switch to the "ON" position, set the choke lever to "CLOSED" if the engine is cold, and then pull the starter grip lightly until resistance is felt before pulling it briskly.
If the Stihl RB 400 does not start, check the fuel level and quality, ensure the spark plug is clean and functioning, confirm that the choke is set correctly, and verify that the air filter is clean.
The oil in the Stihl RB 400 should be changed after the first 5 hours of use, and then every 50 hours of operation or annually, whichever comes first. Use SAE 10W-30 oil for optimal performance.
To store the Stihl RB 400 during the off-season, drain the fuel tank and carburetor, change the oil, clean the unit thoroughly, and store it in a dry, well-ventilated area away from direct sunlight.
To clean the nozzle tips of the Stihl RB 400, remove the tips and soak them in a solution of water and detergent, then use a small brush or needle to clear any obstructions before rinsing them with clean water.
If there is no water pressure, ensure the water supply is adequate and hoses are not kinked. Check the inlet filter for clogs and inspect nozzle tips for debris.
Yes, the Stihl RB 400 is equipped with a detergent system. Use only detergents specifically designed for pressure washers, and follow the manufacturer’s instructions for mixing and application.
To replace the spark plug, first disconnect the spark plug wire, remove the old spark plug using a spark plug wrench, and install a new plug with the recommended gap. Reattach the spark plug wire securely.
Regular maintenance includes checking and changing the oil, cleaning or replacing the air filter, inspecting and cleaning the spark plug, and checking hoses and connections for leaks or wear.