Graco 17E826 GMAX II 3900 Standard Series Gas Airless Sprayer, Lo-Boy

Graco 17E826 GMAX II 3900 Lo-Boy delivers exceptional power and reliability for professional contractors, built to handle large-scale spraying projects with ease.

Engine: Honda GX120 (120cc)
Pressure: Up to 3,300 PSI
Flow Rate: 1.25 GPM — supports dual-gun use
SmartControl 3.0 ensures consistent pressure
Endurance Chromex Pump with quick-change ProConnect 2 system
Lo-Boy Frame offers stability and easy transport

List Price: $9450

You save: $2544 (26.92%)

Sale Price: $6906

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Description

Powerful and Reliable Gas Airless Sprayer for Professional Contractors

Compatible Machines

Graco GMAX II 5900 — shares many pump, hose, and tip components.
Graco GMAX II 7900 — compatible accessories and spray system parts.
Graco GMAX 3400 — partial compatibility with hoses and spray tips.
Graco GMAX II 3900 Hi-Boy — same pump and engine system, different frame setup.
Other Graco Gas Airless Sprayers using RAC X tips, BlueMax II hoses, and ProConnect pump parts.

Overview

Graco 17E826 GMAX II 3900 Standard Series Gas Airless Sprayer, Lo-Boy is designed for professional contractors who need reliability and power on every job site. It offers higher performance, dual-gun capability, and advanced electronic pressure control for consistent spray patterns on a variety of coatings and surfaces.

Key Specifications

Engine Type	Honda GX120 (120cc)
Maximum Working Pressure	3,300 PSI (22.8 MPa)
Maximum Flow Rate	1.25 GPM (4.73 L/min)
Maximum Tip Size	0.036" (Single Gun) / 0.023" (Dual Gun)
Pump Type	Endurance Chromex Pump with ProConnect 2 system
Pressure Control	SmartControl 3.0 for consistent spray pressure
Frame Style	Lo-Boy frame — stable and easy to transport
Included Accessories	Contractor PC Spray Gun, RAC X LP 517 Tip, BlueMax II Hose (50 ft), Tip Guard, TSL 4 oz
Dimensions (L × W × H)	46.9" × 24.4" × 26.4"
Weight	Approx. 123 lbs (56 kg)

Key Features

Dual-Gun Capability for handling large projects efficiently.
SmartControl 3.0 ensures smooth, consistent spray patterns.
ProConnect 2 Pump Replacement System enables quick maintenance on-site.
Durable Honda GX120 Engine provides reliable performance in tough environments.
Lo-Boy Design offers a stable, low center of gravity for easier transport and storage.

Frequently Asked Questions

The Lo-Boy version has a lower frame for better stability and easier transport, while the Hi-Boy design sits higher and is easier to move around rough job sites.

Yes, the Graco GMAX II 3900 supports dual-gun spraying for increased productivity on larger surfaces.

It can spray a wide range of coatings, including latex paints, acrylics, primers, and enamel coatings, making it suitable for commercial, residential, and industrial applications.