GMAX II 7900 ProContractor is Graco’s largest mechanical workhorse—powered by a 6.5 HP Honda GX200 and pushing 2.2 GPM at a steady 3,300 psi. It atomises block-fillers, elastomerics, roof coatings—even two-gun epoxy runs—through tips up to .048 in. When the pump finally needs fresh packings, filters or an entire lower, “close-enough” knock-offs are a gamble you can’t afford. Our catalog is 100 % OEM so SmartControl 4.0 stays rock-steady, overspray shrinks, and profit grows.

Five Reasons Pros Stick with Genuine Graco Parts

±0.002-in Machining —Vortex Chromex™ rods seat perfectly, preventing the micro-pressure swings that cause “fingers” in finish coats.
MaxLife™ Pump Wear Sleeve —lab tests show 2× the packing life of aftermarket steel, even on grit-filled block fillers.
QuikReel™ Hose Management —deploys or rewinds 300 ft of graco hose in under a minute, keeping rigs tidy and OSHA-safe.
Gear-Train Warranty —coverage vanishes when non-OEM parts enter the mix; keep the paperwork intact and the CFO smiling.
BlueLink™ Telemetry —log gallons, hours and locations from any phone; schedule seal kits before failures snowball.

Performance Specs at a Glance

Metric	Value
Engine	Honda GX200 6.5 HP
Max Flow Rate	2.2 GPM / 8.3 L min⁻¹
Max Working Pressure	3,300 psi / 228 bar
Max Tip (1 gun)	.048 in RAC X LP
Recommended Hose Length	Up to 300 ft (3/8 in) without pulsation
Dry Weight	≈ 202 lb (Hi-Boy config)

One Parts Bin—Multiple Rigs Covered

Big fleets love SKU consolidation. The pump lowers, filters, and gear sets in this collection also bolt into:

GMAX II 5900 HD (identical Chromex pump)
TexSpray 7900 HD texture rigs requiring higher flow
DutyMax GH 300 HD when outfitted with 7900 manifold kit
LineLazer 3400 stripers sharing the Endurance™ lower
Ultra Max II 1095 Gas retro-fits (pump & filter block)

Six Ways Genuine Parts Slash Operating Costs

1. Fuel Savings —tight packings drop engine load by up to 12 %, trimming generator or petrol spend.

2. Tip Longevity —clean 60-mesh Easy-Out™ filters stop grit that rounds graco airless sprayer tips; field trials show 30 % longer edge life.

3. Less Overspray —steady pressure lets you dial back to 2,400 psi on finish coats, cutting masking labour almost in half.

4. Five-Minute Pump Swaps —QuikPak™ lowers cost less than an hour of idle payroll; pull, pin, prime, and the crew’s back on brush-cut.

5. Warranty Shield —gear-train claims average $700; OEM parts keep the lifetime coverage in force.

6. Telematic Scheduling —BlueLink™ alerts flag suction leaks before they scar the rod, avoiding $400 rebuilds down the road.

Bundle-Ready Accessories That Ship with Your Order

graco paint gun accessories—Contractor PC gun, swivel unions, whip hoses.
graco suction hose—kink-free, solvent-rated to 350 psi.
magnum lts 17 paint sprayer manual—cross-train new hires on familiar controls.
graco gun repair kit—seat, spring, O-rings & vise-grip tool.
graco texture guns—switch from paint to fireproofing in minutes.
graco airless sprayer tips—RAC X LP lineup from .015 to .048.

Pro Tips for Multi-Season Reliability

• Top off TSL throat-seal lubricant every fuel break.
• Change engine oil each 100 hrs; 10W-30 summer, 5W-20 winter.
• Rotate tip sizes—.021 primer, .017 finish—to double tip life.
• Flush warm: 110 °F water removes latex 4× faster than cold—save solvent for oil jobs.
• Colour-code bins so graco suction hose gaskets never mingle with graco gun repair kit O-rings.
• Mount the laminated pump parts diagram on the trailer wall for instant torque checks.

Ready to Crush Your Next Bid?

Click Add to Cart for genuine GMAX II 7900 ProContractor parts. They’re backed by Graco’s factory warranty.

Graco GMAXII 7900 ProContractor Series Gas Airless Sprayer Parts

Your One-Stop Source for OEM Graco GMAX II 7900 ProContractor Series Gas Airless Sprayer Parts & Kits