Why does my Kärcher HD 4.0/40 G engine operate for 15 minutes then stop?
- AAnn BlackSep 16, 2025
If your Kärcher Pressure Washer engine operates for only 15 minutes before stopping, consider these possibilities: * Not enough gas or engine oil: Fill the tank with gas and check the oil level. * Vapor lock developed by heat of day: Keep the gas tank full to avoid vapor locking. * Obstruction in fuel filter: Clean or replace the fuel filter.












