Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Kärcher Spare Pistol, model 2.641-959.0. This genuine Kärcher replacement part is designed for Kärcher pressure washers in the K 2 to K 7 series, ensuring compatibility and reliable performance. Please read these instructions carefully before use to ensure safe and effective operation.

Image: The Kärcher Spare Pistol, a black and yellow trigger gun with a connected high-pressure hose, ready for use with compatible Kärcher pressure washers.
Important Safety Information
Always observe basic safety precautions when using pressure washer accessories. Failure to follow these instructions may result in injury or damage to the equipment.
- Ensure the pressure washer is turned off and depressurized before connecting or disconnecting the pistol.
- Wear appropriate personal protective equipment, including eye protection, during operation.
- Do not point the spray gun at people, animals, or electrical equipment.
- Verify all connections are secure and leak-free before starting the pressure washer.
- Keep children and pets away from the operating area.
Setup and Installation
This spare pistol is designed for easy replacement. Before beginning, ensure your pressure washer is disconnected from its power source and water supply, and that any residual pressure has been released by squeezing the trigger of the old pistol.
- Disconnect Old Pistol: Carefully disconnect the high-pressure hose from your existing pistol. Depending on your model, this may involve unscrewing a connection or releasing a quick-connect fitting.
- Prepare New Pistol: Inspect the new Kärcher Spare Pistol (Model 2.641-959.0) for any visible damage.
- Connect High-Pressure Hose: Attach the high-pressure hose to the inlet of the new pistol. Ensure the connection is fully seated and tightened securely to prevent leaks. For models with a clamp mechanism, ensure the clamp is fully pulled out before inserting the hose, then push it in to secure.
- Connect Spray Lance/Nozzle: Attach your desired spray lance or nozzle to the outlet of the pistol. Twist or click into place until it is firmly secured.
- Check Compatibility: This pistol is compatible with Kärcher pressure washers from the K 2 to K 7 series. Refer to your pressure washer's original owner's manual for specific compatibility details and proper part number identification if unsure.

Image: The Kärcher Spare Pistol showing the connection point for the high-pressure hose, which needs to be securely attached. The hose end with its metal fitting is visible, ready for insertion.
Operating Instructions
Once the Kärcher Spare Pistol is securely installed, you can begin operating your pressure washer.
- Connect Water Supply: Connect your pressure washer to a suitable water supply.
- Connect Power: Plug in your pressure washer to a grounded electrical outlet.
- Purge Air: Before turning on the pressure washer, squeeze the trigger on the pistol to allow water to flow through and purge any air from the system. This helps protect the pump.
- Start Pressure Washer: Turn on your pressure washer. The pump will build pressure.
- Begin Cleaning: Squeeze the trigger on the pistol to activate the high-pressure spray. Release the trigger to stop the flow.
- Safety Lock: The pistol features a safety lock to prevent accidental activation. Engage the lock when the pistol is not in use or during breaks in cleaning.

Image: A person demonstrating the use of a Kärcher pressure washer, holding the pistol to clean a wooden deck, illustrating typical operation and spray pattern.
Maintenance
Proper maintenance will extend the life of your Kärcher Spare Pistol.
- Cleaning: After each use, rinse the pistol with clean water to remove any detergent residue or debris.
- Storage: Store the pistol in a dry, frost-free environment. Disconnect it from the pressure washer and hose for long-term storage.
- Inspection: Periodically inspect the pistol for signs of wear, cracks, or leaks, especially around the connections. Replace if damaged.
- O-Rings: Check the O-rings at the connection points for wear. Replace them if they appear flattened or cracked to ensure a watertight seal.
Troubleshooting
If you encounter issues with your Kärcher Spare Pistol, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Water leaking from connections | Loose connection, worn O-ring, damaged hose fitting. | Ensure connections are tight. Inspect and replace O-rings if necessary. Check hose fitting for damage. |
| No water flow or low pressure | Pistol safety lock engaged, clogged nozzle, air in system, pressure washer issue. | Disengage safety lock. Clean or replace nozzle. Purge air from system. Refer to your pressure washer's manual for pump-related issues. |
| Pistol trigger stuck or difficult to press | Internal debris, spring issue. | Ensure no external obstructions. If internal, professional service may be required. |
Specifications
- Model: 2.641-959.0
- Brand: Kärcher
- Compatibility: Kärcher K 2 - K 7 series pressure washers
- Power Source: Manual (accessory for powered pressure washers)
- Color: Black
- Item Weight: Approximately 0.2 Kilograms (7 ounces)
- Product Dimensions (L x W x H): Approximately 16.61" x 1.57" x 7.13"
Warranty and Support
For warranty information and technical support regarding your Kärcher Spare Pistol or other Kärcher products, please refer to the official Kärcher website or contact Kärcher customer service directly.
You can visit the official Kärcher store for more information: Kärcher Store on Amazon