Stihl RE 120 - User Manual

Questions and Answers

G
Garrett MooreAug 19, 2025
Why won't my Stihl Pressure Washer start when I squeeze the spray gun trigger?
- A
  Andrea ThompsonAug 19, 2025
  There are several possible reasons why your Stihl pressure washer might not start. First, check that the mains plug of the connecting cable or extension cord is properly plugged in. Another reason could be that the circuit-breaker (fuse) or the residual current circuit breaker has tripped due to an electrical overload or a fault in the circuit. If this is the case, look for the cause of the tripping, remedy it, and then engage the circuit-breaker. Also, ensure that the fuse rating of the socket is adequate and that you are using an extension cord with the correct cross-section and length. Finally, the electric motor may be too warm; allow the pressure washer to cool for 5 minutes and clean the nozzle.
Z
Zachary FloresAug 21, 2025
What to do if my Stihl Pressure Washer switches off while in operation?
- J
  James ZunigaAug 21, 2025
  If your Stihl pressure washer switches off during operation, there are a few things you can check. Make sure that the plug of the connecting cord or extension cord is securely plugged into the socket. Also, examine the circuit-breaker (fuse) or the residual current circuit breaker, as it may have tripped due to an electrical overload or a fault in the circuit. If tripped, identify and fix the cause, then re-engage the breaker. Lastly, ensure that the fuse rating of the socket is sufficient for the pressure washer's power needs.
A
Anthony HartmanAug 25, 2025
Why won't my Stihl RE 120 Pressure Washer start when I squeeze the trigger?
- N
  Nancy VazquezAug 25, 2025
  If your Stihl Pressure Washer does not start even when you squeeze the spray gun trigger, there are several possible reasons. First, check if the mains plug of the connecting cord or extension cord is properly plugged in. Another reason may be that the circuit breaker or overload cutout has tripped due to an electrical overload or fault. In that case, identify and fix the cause of the tripping, then reset the breaker or cutout, and switch off other devices connected to the same circuit. Also, ensure that the socket has the correct fuse rating. If using an extension cord, make sure it has an adequate cross-section and is not too long. Finally, the electric motor may be too warm; allow the pressure washer to cool for 5 minutes and clean the nozzle.
T
tylermartinAug 26, 2025
What to do if detergent additive is not being drawn in Stihl RE 120 Pressure Washer?
- A
  Amanda MillerAug 26, 2025
  If your Stihl pressure washer is not drawing in detergent additive, first check if the container is empty and fill it with detergent. If the container is full, the nozzle of the spraying set may be blocked, so clean it.
V
Victoria Rodriguez DDSAug 28, 2025
Why are connections with pressure washer, high-pressure hose, spray gun or spray lance stiff on my Stihl RE 120 Pressure Washer?
- M
  masonlynchAug 28, 2025
  If the connections between your Stihl pressure washer, high-pressure hose, spray gun, or spray lance are stiff, it is likely that the gaskets of the connections have not been greased. Lubricate the gaskets to resolve this issue.
A
Adam KleinAug 29, 2025
What to do if my Stihl RE 120 Pressure Washer switches off while in use?
- S
  Sarah AlexanderAug 30, 2025
  If your Stihl Pressure Washer switches off during operation, there are a couple of things you should check. First, make sure that the plug of the connecting cord or extension cord hasn't been pulled out of the socket. If it has, plug it back in. Secondly, the circuit breaker or overload cutout might have tripped due to an electrical overload or a fault in the circuit. Find the cause of the tripping, fix it, and then reset the circuit breaker or overload cutout. You might also want to switch off other appliances connected to the same circuit.
P
pruittanthonySep 1, 2025
Why is my Stihl RE 120 not drawing detergent?
- G
  gregorymooreSep 1, 2025
  If the detergent additive is not being drawn in by your Stihl Pressure Washer, the first thing to check is whether the container is empty. If so, fill it with detergent. Also, the nozzle of the spraying set may be blocked, so try cleaning it.
C
Crystal PenaSep 3, 2025
Why does the pressure working pressure fluctuate or drop on my Stihl RE 120?
- J
  Juan CollinsSep 3, 2025
  If the working pressure of your Stihl pressure washer fluctuates or drops, it could be due to several reasons. First, ensure that the water tap is fully open and that there is a sufficient quantity of water available. A blocked nozzle or a blocked water intake screen or water filter can also cause this issue, so clean them accordingly. If these steps don't resolve the problem, the high-pressure pump, high-pressure hose, or spray attachment may be leaking or faulty, and you should have it inspected by a STIHL servicing dealer.
S
Sabrina BuckleySep 5, 2025
Why is my Stihl Pressure Washer's high-pressure pump repeatedly switching on and off?
- T
  Tiffany MclaughlinSep 5, 2025
  If the high-pressure pump on your Stihl pressure washer repeatedly switches on and off without you squeezing the spray gun trigger, this may indicate a leak in the high-pressure pump, high-pressure hose, or spray attachment. It is recommended to ask a STIHL servicing dealer to inspect the pressure washer.
C
Christina RodriguezSep 7, 2025
How to fix the shape of the water jet if it has changed on my Stihl RE 120 Pressure Washer?
- S
  Steven WilsonSep 7, 2025
  If the shape of the water jet from your Stihl pressure washer has changed, it's likely due to a blocked or worn nozzle. Try cleaning the nozzle first. If that doesn't solve the problem, you may need to fit a new nozzle.

Stihl RE 120 Specifications

General

Form factor	Upright
Hose length	8 m
Cable length	5 m
Power source	Electric
Product color	Black, Orange
Pump material	Aluminum
Detergent tank	-
Maximum flow rate	500 l/h
Minimum flow rate	400 l/h
Sound power level	81 dB
Vibration emission	3.8 m/s²
Working pressure (max)	140 bar
Working pressure (min)	125 bar
Maximum water temperature	40 °C
AC input voltage	230 V
Power consumption (typical)	- W