Stihl RB 800 - User Manual

Questions and Answers

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debbie19Aug 14, 2025
Why is there no detergent coming out of my Stihl RB 800?
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  Tyler HicksAug 14, 2025
  If your Stihl Pressure Washer isn't dispensing detergent, the issue might be due to a few reasons: the detergent tank could be empty (fill the detergent tank), there might be a clog in the suction hose or suction intake filter (eliminate the clog), the injector could be dirty or clogged (clean the injector), or the detergent nozzle/low-pressure nozzle isn't inserted or is clogged (insert/clean the detergent nozzle/low-pressure nozzle).
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Kelsey RileyAug 20, 2025
What to do if my Stihl RB 800 is not dispensing detergent?
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  Janet JordanAug 20, 2025
  If no detergents are being dispensed from your Stihl Pressure Washer, first ensure that the detergent tank is filled. If the tank isn't empty, check the suction hose and filter for any clogs and remove them. Also, the injector could be dirty or clogged, so clean it. Finally, make sure the detergent nozzle or low-pressure nozzle is properly installed and clean.
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Dr. Troy KnoxAug 25, 2025
What causes milky and foamy oil in my Stihl Pressure Washer's high-pressure pump?
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  Russell VazquezAug 25, 2025
  If the oil in the high-pressure pump of your Stihl Pressure Washer appears milky and foams, it means there is water in the oil. You should change the oil in the high-pressure pump.
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marylynchAug 27, 2025
What to do if oil is leaking from my Stihl RB 800 Pressure Washer's high-pressure pump?
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  George JonesAug 27, 2025
  If oil is leaking from the high-pressure pump of your Stihl Pressure Washer, it indicates that the pump is leaky and needs to be repaired by a servicing dealer.
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Clifford OwensAug 31, 2025
What to do if water comes out of the thermal relief valve on my Stihl RB 800?
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  Cynthia SmithAug 31, 2025
  If water is coming out of the thermal relief valve on your Stihl Pressure Washer, it could be due to a couple of reasons. The water temperature may be too high, so avoid running the pressure washer for more than 3 minutes without active spraying.
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Robert VaughanSep 2, 2025
What does it mean if the oil in my Stihl RB 800 Pressure Washer pump is milky?
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  Samuel LopezSep 3, 2025
  If the oil in your Stihl Pressure Washer's high-pressure pump appears milky or frothy, it indicates that there is water in the oil of the high-pressure pump. You should change the oil in the high-pressure pump.
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Helen NguyenSep 6, 2025
How to fix low water pressure on my Stihl RB 800?
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  Gregory BatesSep 6, 2025
  If your Stihl Pressure Washer is not producing enough water pressure, start by checking the water and high-pressure hoses for kinks and remove them or replace the high-pressure hose. Ensure that the water supply is sufficient by fully opening the water tap and checking the diameter and length of the intake hose. If equipped, make sure the engine is running at full throttle. Clean the water intake screen, vent any air from the system by actuating the spray gun, and check all water flow connections for leaks. Also, clean or replace a clogged or worn high-pressure nozzle. If the high-pressure pump is frozen, thaw it out. Ensure that the water temperature is within the permissible limits.
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casey30Sep 9, 2025
Why is water coming out of the thermal pressure relief valve on my Stihl Pressure Washer?
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  Elizabeth RiveraSep 9, 2025
  Water emerging from the thermal pressure relief valve on your Stihl Pressure Washer indicates that the water temperature is too high. To resolve this, avoid running the high-pressure washer in standby mode for more than 3 minutes. If the problem persists, the thermal pressure relief valve may be defective and require professional inspection.
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Tracy RossNov 16, 2025
Why is my Stihl RB 800 Pressure Washer losing pressure or fluctuating?
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  Charles NixonNov 16, 2025
  If your Stihl Pressure Washer is experiencing pressure drops or fluctuations, and there's not enough water coming from the nozzle, several factors could be at play. The water hose or high-pressure hose might be kinked (remove the kink or replace the high-pressure hose). There could be a shortage of water (open the water tap completely and check the diameter and length of the intake hose). The engine speed might be too low (run the engine at full throttle). The water intake screen could be clogged (clean the water intake screen). There might be air in the system (vent the system by actuating the spray gun several times at short intervals), or the high-pressure pump might be drawing air (check all connections in the water intake and seal if necessary). The high-pressure nozzle could be clogg...