The Graco Magnum ProX17 (17G177 stand / 17G178 cart) is the step-up machine built for property maintenance pros and remodelers — ¾ HP DC motor, 300 gal/year rating, 150-ft hose support, and the ProXChange no-tools pump swap system. Every OEM part, shipped same day from Houston, TX.
Models 17G177 (stand) & 17G178 (cart) — built for professionals, rated for 300 gal/year
Genuine OEM replacement parts for the Graco Magnum ProX17 — both stand (17G177) and cart (17G178) models. Every part ships factory-sealed from Graco's authorized distribution chain.
The ProX17 is the only Magnum-series machine with the ProXChange no-tools pump replacement system. When the pump wears out — no teardown, no wrenches, no service centre trip:
The ProX17 comes in two configurations: 17G177 (stand) and 17G178 (cart). Both use the same internal parts. Your model number is on the silver serial tag on the machine body. Not sure which part fits? Call 713-931-4102 — we'll confirm in under 2 minutes.
The ProX17's higher annual rating (300 gal/year) means longer service intervals than the X5 or X7 — but the same predictable failure sequence when maintenance is neglected.
Prime the machine, switch to SPRAY (no tip), pull trigger 5 seconds then release. Count seconds before motor restarts. 15+ seconds = healthy. 10–14 = order a pump kit this week. Under 10 = rebuild before next job. Paint visible at the pump housing = stop immediately.
| Problem | Most Likely Cause | Symptom | Part # |
|---|---|---|---|
| Won't prime | Inlet Valve | Motor runs — no paint draws from bucket | 17J876 |
| Pressure collapses at gun | Outlet Valve | Primes OK — gun pressure drops during spraying | 17J880 |
| PRIME works, SPRAY doesn't | Drain Valve | Draws in PRIME — switching to SPRAY builds no pressure | 235014 |
| Slow / no startup | PushPrime Kit | PushPrime unresponsive — startup takes 30+ seconds | 17J878 |
| Weak pressure overall | Full pump wear | Motor cycles <10 sec — all valves check out | 17J874 / 24Y472 |
17J874 — ProX Pump Assembly Kit: Complete pump assembly replacement with all internal components pre-assembled. Best when you want a factory-fresh rebuild. 24Y472 — ProXChange Pump: The drop-in no-tools replacement specific to the ProXChange system. Slide out the old pump, slide in the new one. Under 5 minutes with no wrenches. Both deliver factory performance — choose based on your preference for rebuild vs replace.
The ProX17, X7, and X5 share many parts — but these differences determine which machine is right for which job, and which parts are model-specific.
| Feature | ProX17 (This Model) | Magnum X7 | Magnum X5 |
|---|---|---|---|
| Motor | ¾ HP DC | ⅝ HP | ½ HP |
| Flow Rate | 0.34 GPM | 0.31 GPM | 0.27 GPM |
| Annual Rating | 300 gal/year | 125 gal/year | 125 gal/year |
| Max Hose | 150 ft | 100 ft | 75 ft |
| Max Tip Size | .017" | .017" | .015" |
| Included Hose | 50 ft | 25 ft | 25 ft |
| Spray Gun | SG3 (swivel) | SG2 | SG2 |
| Pump System | ProXChange (no-tools swap) | Embedded rebuild | Embedded rebuild |
| Drain Valve Part # | 235014 | 17P098 | 17V783 |
| Shared Parts | 17J876 inlet · 17J880 outlet · RAC X tips · Pump Armor · Gun filters | ||
Authorized Graco dealer since 2010
All parts come directly from Graco with full manufacturer warranty. We never sell aftermarket substitutes or knock-off components that void your warranty.
Genuine Graco parts in our warehouse ready to ship. Same-day shipping on qualifying orders placed before 1pm CST, Monday–Friday.
Our team has years of hands-on Graco experience. We'll identify the right ProX17 part for your model and troubleshoot any issues you encounter.
Best prices on genuine Graco parts. We offer volume discounts for contractors and property maintenance professionals who buy regularly.
30-day return policy on all parts in new, unused condition. Order the wrong component? No problem. Returns are simple and fast.
Access exploded-view diagrams for the ProX17 and 50+ other Graco models. Find the exact part number for your configuration before ordering.
Common questions about Graco Magnum ProX17 parts, the ProXChange system, and ordering
