Graco GMAX II 3900 ProContractor Series 3300 PSI @ 1.25 GPM Gas Airless Sprayer - Hi-Boy

Graco GMAX II 3900 ProContractor Series 3300 PSI @ 1.25 GPM Gas Airless Sprayer - Hi-Boy

Marsoni

M251S

$3667.50

Get it in 3 business days with 1 day shipping. Friday, May 29

Graco GMAX II 3900 ProContractor Series 3300 PSI @ 1.25 GPM Gas Airless Sprayer - Hi-BoyProducing 65% more performance than the GMAX 3400, the GMAX II 3900 has the power and flow to handle up to two guns and is ideal for the professional contractor who sprays a wide variety of coatings. Work Smarter, Finish More Jobs. Graco GMAX ProContractor Series gas powered airless paint sprayers are designed to deliver speed & performance so you can get to the next jobsite faster and increase your profits. Endurance Vortex MaxLife Piston Pump

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MUCH better than the cheap plastic OEM part, Just a reminder though, these thread into an aluminum block so be very careful to start them finger tight first, then evenly tighten both bolts to push the fitting into the chamber. If you don't, it will slightly misalign and you run the risk of stripping the threads. The one comes with the replacement o ring, and be sure to get some antifreeze on that seal prior to attempting to push it into the chamber. IT IS A TIGHT FIT, but that's what you want, so just be careful. You might also want an extra hose clamp on hand, as the one that came with this began to bend as it got tight, so I had to replace it for peace of mind. Overall, great product though.

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Reviewed in the United States on January 9, 2026