The GRACO 25N677 G-Force II 4040 HG-DD is a gas-powered, contractor-grade pressure washer designed for heavy-duty surface cleaning. It features a robust aluminum frame for durability and corrosion resistance, and is engineered for reliable, high-performance cleaning in both large residential and commercial settings.
Key Features:
Gas Pressure Washer
G-Force II 4040 HG-DD
Heavy-gauge aluminum frame (up to 40% lighter than steel, corrosion resistant)
4 GPM (Gallons per Minute)
Maximum fluid pressure: 4000 psi (27.6 MPa, 276 bar)
Designed for use with standard pressure washer accessories and quick connect fittings
Direct drive motor for compact, lightweight design
GP Triplex Plunger water pump for reliability
Honda GX390 engine for easy starting and power
EZ Start Pressure Relief for easier starting (bypasses pump pressure)
Oil Alert and thermal sensor for engine and pump protection
Recommended for 20–30 hours of weekly use
Includes multiple spray tips and quick connect fittings
Applications: Ideal for large residential or commercial contractors requiring high flow and pressure for tough cleaning jobs such as surface preparation, equipment cleaning, and maintenance tasks.
Installation Notes:
Using genuine GRACO parts ensures optimal performance, reliability, and warranty coverage.
Ensure all connections are secure before operation
Use the included quick connect fittings for easy accessory changes
Follow manufacturer guidelines for engine and pump maintenance
Check oil level and fuel before starting
Use the EZ Start Pressure Relief feature to prevent pressure build-up during startup
Regularly inspect hoses and fittings for wear or leaks
Clean or replace spray tips as needed
Monitor engine oil and coolant levels
Store in a dry, protected area when not in use
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