Karcher K 4 FJ BB, 1.679-561.0 - high pressure washer

Karcher K 4 FJ BB is a high pressure washer designed for efficient cleaning of medium‑duty outdoor surfaces. The unit delivers up to 130 bar of pressure and a water flow of 420 l/h driven by an 1800 W motor. It comes with a 6‑metre hose, integrated water filtration to protect the pump, and convenient on‑board storage for the lance and accessories to keep everything organized during use.

Advantages

The device combines a powerful motor with a compact design that balances cleaning performance and handling. A consistent pressure of up to 130 bar and a steady flow rate make it effective at removing dirt, moss and light grease from patios, garden furniture, vehicles and facades. Integrated water filtration reduces the risk of debris entering the pump, while built‑in accessory storage and hose length enhance usability and reduce setup time.

Suitable for

• Cleaning terraces, patios and paving
• Washing cars, bicycles and small boats
• Removing moss, algae and light stains from house facades
• Cleaning garden furniture and tools
• Preparing surfaces for painting or sealing

Key specifications

• Maximum pressure: 130 bar
• Flow rate: 420 litres per hour
• Motor power: 1800 W
• Hose length: 6 metres
• Integrated water filtration
• On‑board accessory and lance storage
• Suitable for connection to standard outdoor water supply

How to use

Connect the high pressure washer to a suitable water supply, ensuring the integrated filter is correctly seated to prevent debris entering the pump. Attach the lance and select the appropriate nozzle or detergent application accessory for the task. Start the unit according to the manufacturer's instructions and adjust the distance and pressure while keeping the lance moving to avoid surface damage. After use, turn off the unit, release residual pressure by triggering the gun, drain remaining water if freezing temperatures are expected, rewind the hose and store accessories in the onboard compartments.

Usage recommendations

Use lower pressure settings and greater distance on painted surfaces, wood and soft materials to avoid damage. For stubborn dirt, apply detergent compatible with high pressure washers and allow short dwell time before rinsing. Regularly check and clean the water filter to prolong pump life and follow local regulations for wastewater disposal when using cleaning agents.