GRACO 17E842 - GMAX II 7900 HD 3-in-1 ProContractor Series Gas Airless Sprayer, 3300 PSI

The GMAX II HD 7900 is a professional-grade gas-powered airless sprayer in GRACO's ProContractor Series, designed to deliver speed and performance for contractors to complete jobs faster and increase profits. This heavy-duty sprayer features a direct-immersion pump design and oversized hose capabilities for maximum versatility across spray applications.

The GMAX II 7900 HD airless texture sprayer delivers the highest performance for the biggest jobs. With maximum flow and extreme durability, this sprayer does it all — skim coat in a Level 5 finish, drywall mud in a variety of finishes, all paints and primers and other heavy coatings.

Everyday Reliability. GMAX II HD Standard Series airless texture sprayers deliver unmatched durability and performance, with the capability to handle the widest range of tip sizes, longer hose lengths and heavier coatings with ease.

• Endurance MaxLife Piston Pump
  
  • Lasts 6X longer between repacks
  • Features exclusive hardened MaxLife sleeve and rod
  • Oversized clearances ensure minimal pressure drop
• MaxFlo 2 with Pack-Out Protection
  
  • Less pack-out, more productivity
  • Self-cleaning Vibra-Seal Technology eliminates material build-up
  • Continuous spraying with True Pack-Out Protection for more productivity
  • Optimized fluid passageways for the heaviest coatings
• SmartControl 3.0
  
  • Consistent spray fan & pressure control
  • Ideal for low overspray applications with the lowest dead band at any pressure
• Precision Advantage Drive
  
  • The longest lasting drive
  • Improved jobsite conditions with extremely quiet operation
  • Lifetime Warranty
• Honda® GX Engine
  
  • Reliable, Powerful & Easy-to-Start
  • Oil Alert shuts down engine to prevent damage if oil level drops too low
• Easy Out Pump Filter
  
  • Easy Pump Maintenance & Less Clogging
  • Inside-out design means less mess with fewer tip clogs
• Rugged, Durable Cart Design
  
  • Rugged and easy-to-move
  • Withstands tough jobsite conditions while absorbing impacts and vibrations
  • Easy hose storage with integrated hose wrap and telescoping handle
  • Easy loading with built-in lift handles
• Heavy-Duty Prime Valve
  
  • Maintenance-free high-pressure dumping capability

Additional Specifications

• Flow Rate: 8.3 l/min (2.2 gpm)
• Max Working Pressure: 227 bar (3300 PSI)
• Pump Type: Mechanical Direct-Immersion
• Weight: 74 kg (161 lbs)
• Hose Size: 1/4 inch x 15 m (3/8 inch x 15 m)
• Whip Hose: 1/4 inch x 0.9 m
• Power: Gas-Powered
• Application: architectural paints and coatings
• Use: professional use only
• Explosion Rating: Not approved for use in European explosive atmosphere locations

Compatible Material	Stains, Oil, Lacquer, Primers, Fillers, Acrylics, Interior Emulsions, Exterior Emulsions, Latex, Plaster, Anti-Corrosive Paints, Fire-Retardant Paint, Intumescent
Compatible Replacement Pump	17H835
Construction	Acetal, Aluminum, Chrome Plating, Fluoroelastomer, Leather, Nylon, PTFE, Polyurethane, Stainless Steel, Tungsten Carbide, UHMWPE, Zinc-Plated Carbon Steel, Nickel-Plated Carbon Steel
Convertible	Non-Convertible
Engine Brand	Honda
Engine Size (HP)	6.5
Features	Endurance Vortex MaxLife Pump, SmartControl 3.0, QuikReel, Honda Engine, Advantage Drive, ProConnect 2, Easy Out Filter, Crushproof Inlet Strainer, Heavy-Duty Prime Valve, WatchDog, LED Display, Contractor PC Gun
Filter Mesh Size	60
Fluid Hose Inside Diameter (in)	1/4
Fluid Inlet Size (in)	1-5/16
Fluid Inlet Thread Type	UN-2A
Fluid Outlet Size (in)	3/8
Fluid Outlet Thread Type	NPSM
Frame Configuration	Hi-Boy
Hose Inlet Diameter (in)	1/4
Hose Reel Type	QuikReel
Includes	Heavy-Duty Blue Texture Gun, RAC X LTX 427 Spray Tip, RAC X LTX 531 Spray Tip, RAC X Guard, 3/8 in x 50 ft BlueMax II Airless Hose, 1/4 in x 3 ft BlueMax II Airless Whip Hose
Inlet Paint Strainer	8 Mesh Stainless Steel Screen
Maximum Flow Rate (GPM)	2.2
Maximum Fluid Working Pressure (psi)	3300
Maximum Hose Length (ft)	200
Maximum Sound Pressure Level (dB(A))	96
Maximum Tip Size (in)	0.048
Maximum Tip Size 1 Gun (in)	0.048
Maximum Tip Size 2 Guns (in)	0.035
Maximum Tip Size 3 Guns (in)	0.027
Maximum Tip Size 4 Guns (in)	0.023
Maximum Working Pressure (MPa)	22.8
Maximum Working Pressure (psi)	3300
Model	GMAX II HD
Number of Guns	1
Outlet Paint Filter	60 Mesh Stainless Steel Screen
Overall Height (in)	38.0
Overall Length (in)	33.3
Overall Width (in)	24.4
Power Rating (HP)	6.5
Power Rating (W)	4847
Power Rating (kW)	4.85
Power Source	Gas
Pressure Control Type	SmartControl 3.0
Product Series	ProContractor
Pump Mount Type	ProConnect 2
Pump Rod Type	MaxLife
Pump Sleeve Material	MaxLife
Pump Type	Endurance Vortex
Recommended Annual Usage	Up to 1,000 gallons per week
Series	7900
Spray Gun Type	HD Blue Texture Gun
Spray Type	Airless
Type	Airless Sprayer
Weight (lb)	167

Features

• MaxLife pump technology for extended service life
• Vortex ProConnect 2 connection system
• HD texture capability for heavy-duty applications
• MaxLife piston rod and sleeve
• Contractor PC gun with HD Blue Texture capability
• Ready to spray - ships complete and assembled

Applications

• Professional painting contractors
• Heavy-duty texture applications
• Commercial painting projects
• Industrial coating applications
• Professional painting applications
• Heavy coatings application

Compatible Equipment

• RAC X tip extensions
• Contractor PC guns
• TexSpray blue guns
• Various hose and whip configurations up to 230 bar
• Oversized hoses for increased flow capacity
• No filter texture guns

Related Parts

• 17E828 - GMAX II 3900
• 17E832 - GMAX II 5900
• 17E840 - GMAX II 5900 HD
• 17E837 - GMAX II 7900
• 24W932 - GH 230 Convertible gas model
• 24W936 - GH 300 Convertible gas model
• 17E820
• 17E843
• 17E841

Kit Contents

• Complete sprayer unit
• Contractor PC gun (HD Blue Texture)
• 517 tip (427, 531 tips included)
• 1/4 inch x 15 m hose
• 1/4 inch x 0.9 m whip hose
• SmartControl 3.0
• WatchDog system
• RAC X guard and tips
• BlueMax II hose
• Universal hammer tool
• Adjustable wrench
• Blue tool box

Part of the GMAX II ProContractor 3-in-1 series. Ships ready to spray with all components included. Features HD texture capability for the most demanding applications. This is part of GRACO's ProContractor Series designed for contractors who need to work smarter and finish more jobs. The 3-in-1 capability and oversized components make it versatile for multiple coating types and applications. Part of the TexSpray 7900HD airless sprayer series for professional application of architectural paints and coatings

Reference Manuals

• 300719 (Page 4) GMAX™ (HD 3-IN-1) ProContractor
• 344383 (Page 9) Gas Airless Sprayers
• 3A6400 (Page 1) GMAX 3400, GMAX II 3900/5900/7900, and TexSpray 5900HD/7900HD Airless Sprayers
• 3A6417 (Page 1) GMAX™ 3400, GMAX™ II 3900/5900/7900, and TexSpray 5900HD/7900HD Airless Sprayers, Parts