The GRACO 17E836 GMAX II 7900 Standard Series Gas Airless Sprayer, Hi-Boy is a heavy-duty, gas-powered airless paint sprayer designed for professional contractors. It features a robust steel cart, a high-performance piston pump, and is engineered for spraying a wide range of coatings, including water, oil, and solvent-based materials. Its primary function is to deliver high-volume, high-pressure spraying for large-scale painting projects.
Key Features:
Gas Airless Sprayer
GMAX II 7900 Standard Series, Hi-Boy
Chrome-plated, welded steel cart with telescoping handle and integrated hose rack; full pneumatic wheels
Up to 2.2 gallons per minute
0–3300 psi
Water, oil, and solvent-based (flammable) coatings; supports multiple guns and long hose lengths
Chromex Endurance Piston Pump (most reliable, lasts 2X longer than leading brands)
QuikPak Cartridge System for fast pump repacking
QuikChange pump design for easy on-site pump swaps
QuikAccess intake foot valve for faster cleaning
SmartControl™ 3.0 electronic pressure control for consistent spray fan
Advantage Drive System with lifetime guarantee
Heavy-Duty Prime Valve (maintenance-free, withstands high pressure dumping)
Rugged, durable cart design with shock-absorbing wheels
Jobsite Ready (includes RAC X SwitchTip, 50 ft BlueMax II hose, Contractor PC Gun, and 517 tip)
Applications: Ideal for large-scale commercial and industrial painting projects, including exterior and interior walls, fences, roofs, and other surfaces requiring high-volume, high-pressure spraying. Suitable for use with a wide range of coatings and tip sizes.
Installation Notes:
Using genuine GRACO parts ensures optimal performance, reliability, and safety. Non-genuine parts may compromise equipment integrity and void warranties.
Assemble the sprayer on a stable, level surface before use.
Ensure all hoses and fittings are securely connected and free from leaks.
Prime the pump according to manufacturer instructions before starting.
Use only recommended tips and accessories for best results.
Regularly inspect and maintain the pump, hoses, and cart for wear and proper function.
Clean the pump and hoses thoroughly after each use to prevent clogging and prolong equipment life.
Repack the pump using the QuikPak Cartridge System as needed.
Check and replace worn or damaged parts promptly.
Store the sprayer in a dry, protected area when not in use.
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