Stihl RE 128 PLUS - User Manual

Questions and Answers

C
Caitlin HoldenAug 8, 2025
Why does my Stihl Pressure Washer pressure fluctuate or drop?
- T
  Thomas JordanAug 8, 2025
  If the pressure fluctuates or drops in your Stihl Pressure Washer, it could be due to several reasons. First, ensure that the water supply is sufficient by completely opening the water tap and complying with the permissible suction lift if you are using suction mode. Check and clean the high-pressure nozzle in the spray head, the water intake strainer in the pump inflow, or the nozzle, as they might be dirty or clogged. If the issue persists, the high-pressure pump may be leaky, or the valves may be defective.
P
pateljenniferAug 14, 2025
How to fix a Stihl Pressure Washer motor that hums but doesn't run?
- Q
  qfowlerAug 14, 2025
  If your Stihl Pressure Washer's motor hums but doesn't run when switched on, it could be due to several reasons. Ensure the mains voltage is adequate and the electrical connections, plug, cable, and switch are in good condition. If you're using an extension cord, make sure it has a sufficient cross-section and isn't too long. Also, check if the mains circuit-breaker has been tripped—if so, switch off the machine, actuate the spray gun until water only drips out, engage the safety catch, and then reset the circuit-breaker. Finally, make sure to actuate the spray gun when switching on the machine.
M
Melissa MarshallAug 19, 2025
Why does my Stihl Pressure Washer motor keep switching on and off?
- M
  Mr. Eric BrownAug 19, 2025
  If the motor of your Stihl Pressure Washer constantly switches on and off, it's possible that the high-pressure pump or spray attachment is leaky.
S
Seth RochaAug 27, 2025
Why is my Stihl Pressure Washer not dispensing detergent?
- T
  Tara ByrdAug 27, 2025
  If your Stihl Pressure Washer is not supplying detergent, check if the detergent tank is empty and fill it if necessary. Also, inspect the detergent intake for any clogs and eliminate them.
F
Frederick BrowningSep 1, 2025
How to fix weak jet on Stihl RE 128 PLUS?
- L
  Leslie GilbertSep 1, 2025
  If the jet from your Stihl Pressure Washer is weak, ragged, or unclean, the nozzle may be fouled. Clean the nozzle following the instructions in the "Maintenance" section.

Summary

Safety Precautions and Working Techniques

Core Safety Rules

Covers electrical safety, general guidelines, and machine/hose safety.

Machine and Hose Safety

Hose, Parts & Accessories Safety

Stresses hose integrity, approved parts, and protective gear for safe operation.

Before Starting Work

Water Supply & Quality Checks

Crucial checks for water mains connection, backflow prevention, and water quality.

Electrical Connection & Inspection

Pre-operation checks & cord safety

Inspects machine, covers voltage, cords, and extension cord specifications.

Electrical Connection & Cord Safety

Cord handling and routing

Emphasizes proper routing and care of power cords to prevent damage and hazards.

During Work Safety

Fluid, Cord & Jet Handling

Warns against hazardous fluids, cord damage, and improper jet direction.

Hazardous Substances & Safety Valve

After Finishing Work

Shutdown and Disconnection

Details steps for safely shutting down the machine and disconnecting power/water.

Maintenance and Repairs

Servicing, DIY vs. Dealer & Cleaning

Assembling the Unit

Fitting and Removing Spray Lance

Fitting and Removing High-Pressure Hose

Hose Connection;Disconnection

Fitting and Removing High-Pressure Hose

Water Supply Connection

Hose Connection & Extension Use

Water Supply Connection

Drinking Water Safety

Essential safety regarding backflow prevention for drinking water mains.

Pressureless Water Supply

Suction Operation & Priming

Connecting to Power Supply

Power Requirements & Extension Cords

Covers voltage, fuse protection, circuit breakers, and extension cord specs.

Switching On

Pre-Operation Checks & Activation

Reminds of checks, proper connection, and machine startup sequence.

Working

Spray Gun Operation & Standby Mode

Nozzles & Accessories Storage

Adding Detergent

Switching Off & After Use

Shutdown, Disconnection & Rinsing

Steps for shutting down, disconnecting, rinsing, and storing hoses.

Storing the Machine

Maintenance and Care

Maintenance Schedule & Checks

Outlines intervals for machine, hose, screen, nozzle, and support maintenance.

Maintenance Procedures

Pre-Use & Nozzle Cleaning

Recommends pre-use steps and detailed nozzle cleaning for optimal performance.

First Use & Wear Prevention

Storage Flush & Damage Avoidance

User Responsibility & Parts Wear

Specifications

Electrical Specifications by Model

Troubleshooting

Motor Operation Issues

Addresses motor not running, intermittent operation, and engine stopping problems.

Spray Jet Quality Issues

Troubleshooting

Pressure Drop & Detergent Supply Issues

Troubleshoots pressure fluctuations and lack of detergent supply.

Maintenance and Repairs

User vs. Dealer Tasks & Parts

Stihl RE 128 PLUS Specifications

General

Operating Pressure	135 bar
Water Flow Rate	500 l/h
Max Water Temperature	60 °C
Power Source	Electric
Power Consumption	2.3 kW
Mains Voltage	230 V
Frequency	50 Hz
Power Cord Length	5 m
Sound Power Level	85 dB(A)