The GRACO 17E828 GMAX II 3900 ProContractor Series Gas Airless Sprayer is a professional-grade, gas-powered airless sprayer designed for contractors who require high productivity and reliability. It is constructed with robust materials for heavy-duty use and is intended for spraying a wide variety of coatings in demanding environments.

Key Features:

• Gas Airless Sprayer
• GMAX II 3900
• Heavy-duty, professional-grade
• 1.25 gallons per minute (4.7 liters per minute)
• 0–3300 psi (227 bar)
• Compatible with up to two spray guns; designed for use with a wide range of coatings
• Endurance Vortex MaxLife Piston Pump for superior pump life and even wear
• ProConnect 2 Pump Replacement System for quick, tool-free pump exchange
• SmartControl 3.0 with LED display for consistent spray fan and pressure control
• QuikReel hose reel for easy hose deployment and rewinding
• WatchDog pump protection to prevent running dry
• Crush-proof suction filter
• Easy Out Filter for quick maintenance
• Contractor PC Gun, RAC X LP 517 Spray Tip, RAC X Guard, 1/4 in x 50 ft BlueMax II Airless Hose included
• Honda GX120 120cc engine for reliable power
• Weight: 133 lbs (57 kg)

Applications:
Ideal for professional contractors spraying a wide variety of coatings, including paints, stains, and sealants, in commercial, industrial, and large residential projects.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, reliability, and safety. Non-genuine parts may compromise equipment integrity and void warranties.
• Follow the manufacturer’s instructions for assembly and setup
• Ensure all connections are secure before operation
• Use only recommended accessories and consumables
• Regularly inspect and maintain filters, hoses, and pump components
• Store equipment in a clean, dry environment when not in use
• Perform regular checks on the pump, filters, and hoses
• Use the ProConnect 2 system for quick pump replacement and reduced downtime
• Lubricate moving parts as recommended
• Clean the sprayer thoroughly after each use to prevent material buildup