Stihl RE 551 - User Manual

Questions and Answers

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madeline47Aug 4, 2025
Why does my Stihl RE 551 Washer pressure fluctuate or drop?
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  Robin ZhangAug 4, 2025
  If you notice pressure fluctuations or drops in your Stihl Washer, consider the following: * Ensure the water tap is fully open and there's a sufficient water inflow, using a 3/4" hose. * Inspect the high-pressure nozzle in the spray head for dirt and clean it if necessary. Refer to the "Maintenance" section for instructions. * Check if the high-pressure nozzle is worn and replace it if needed. * Examine the screens in the water tank intake or high-pressure pump for clogs and clean them, referring to the "Maintenance" section. * If you suspect a leak in the high-pressure pump or a defective valve, have the machine checked by a servicing dealer.
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collinsjohnathanAug 9, 2025
Why does my Stihl RE 551 Washer constantly switch on and off?
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  xhigginsAug 9, 2025
  If your Stihl Washer cycles on and off repeatedly when the spray gun is closed, it could be due to a leak. Check for: * A leak in the spray gun. If found, replace the spray gun. * A leak in the high-pressure hose. If found, replace the high-pressure hose. * Leaks in the high-pressure coupling, high-pressure lines, or heating coil. If you suspect any of these, have the machine inspected by a service dealer. * A leaky high-pressure pump or spray attachment, which also requires inspection by a service dealer.
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Christopher HernandezAug 13, 2025
Why did my Stihl Washer motor stop?
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  Justin ThompsonAug 13, 2025
  If your Stihl Washer motor stops, it may be due to overheating. Check that the supply voltage matches the machine voltage, and allow the motor to cool down for at least 5 minutes.
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theodoremartinAug 17, 2025
What to do if my Stihl Washer has no supply of detergents?
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  David LandryAug 17, 2025
  If your Stihl Washer isn't dispensing detergent, try these steps: * Make sure the detergent tank isn't empty and fill it if needed. * Check for sludge in the detergent tank and clean it out. * Inspect for air in the system. Set the detergent metering valve to the minimum setting, bleed air out of the high-pressure pump, and check the hose from the metering system to the water tank. * Clean the pick-up body to remove any clogs. * Ensure the detergent intake isn't fouled or defective; clean or repair it as necessary.
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James RobertsAug 21, 2025
What to do if my Stihl RE 551 runs erratically?
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  Wayne AndersonAug 21, 2025
  If your Stihl Washer is running erratically, it might be taking in air. Set the detergent metering valve to the minimum setting and bleed air out of the high-pressure pump by removing the spray lance and operating the spray gun until the air has escaped.
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johnwilliamsAug 26, 2025
What causes a Stihl Washer burner to be clogged with soot?
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  Jeremy WilliamsonAug 26, 2025
  A Stihl Washer burner clogged with soot can be caused by contaminated fuel. Use clean fuel. Also, the burner may be dirty or incorrectly adjusted, in that case have the machine checked by a servicing dealer.
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Lucas PetersenAug 30, 2025
Why is the jet weak, ragged, and unclean on my Stihl RE 551 Washer?
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  Katrina KingAug 30, 2025
  If your Stihl Washer produces a weak, ragged, or unclean jet, the high-pressure nozzle in the spray head may be dirty. Clean the high-pressure nozzle; see "Maintenance".