Craftsman CMXGWAS020733 Fitting Size & Compatibility Guide
Standard M22-14mm male outlet.
What Are You Trying to Connect?
Direct compatibility rules and recommended hardware for standard pressure washing upgrades.
Standard 50ft Hose
Standard universal M22-14mm hoses (like UberFlex) screw directly onto your machine pump with zero adapters needed.
Foam Cannon Suction
1.25mm Orifice Jet
Snubby Detailing Gun
Aftermarket snubby guns with M22-14mm female inlets screw directly onto your stock or aftermarket hose.
Surface Cleaner Deck
Maximum recommended deck diameter: 12" to 15" Deck based on the 4-inches-per-GPM rule.
Engineering Specifications & True Working Pressure
Side-by-side analysis of manufacturer advertised marketing ratings vs. real-world dynamic flow physics.
| Specification Parameter | Advertised Factory Rating | True Dynamic Working Spec | Engineering Verification Details |
|---|---|---|---|
| Discharge Pressure | 3100 PSI | 2750 PSI | Advertised is static zero-flow peak; working spec is stabilized nozzle pressure. |
| Water Flow Rate | 2.3 GPM | 2.25 GPM | Measured at continuous operating load under standard atmospheric conditions. |
| Water Horsepower (WHP) | — | 3.61 WHP | Calculated via hydraulic equation: WHP = (PSI × GPM) / 1,714 |
| Motor / Engine Source | Briggs & Stratton 208cc 4-Stroke OHV Engine | ||
| Pump Outlet Thread | M22-14mm Male | Inner stem caliper pin: 14.0mm | |
| Pump Water Inlet | 3/4" GHT Garden Hose Swivel | Standard North American garden hose thread with mesh intake filter. | |
| Stock Hose Dimensions | 25 ft (1/4" ID) | Hose Ends: M22-14mm Female | |
| Spray Wand Outlet | 1/4" Quick-Connect | Standard quick-connect accepts universal spray tips and accessories. | |
Mechanical Engineering Verdict on Power & Performance
Craftsman slaps a 3,100 PSI badge on the shroud, but that's initial burst pressure before the unloader opens. In actual use on concrete or siding, the Briggs 208cc engine pumps out 2,750 true working PSI at 2.25 GPM. That generates 3.61 Water Horsepower ((2,750 × 2.25) / 1,714)—solid cleaning capability for residential driveways, decks, and vehicles.
Technical Fitting Schematic: M22-14mm Male
Mechanical cross-section detailing the stem pin caliper diameter, Viton O-ring compression channel, and thread pitch.
Engineer's Plug-and-Play Upgrade Bill of Materials (BOM)
Field-tested, zero-leak hardware parts specifically matched to the Craftsman CMXGWAS020733.
UberFlex 50ft 3/8" Hose
Eliminates stiff coil memory and reduces pressure drop.
M22-14mm to 3/8" Stainless QC Kit
Quick snap-on convenience.
Field Diagnostics & Real-World Troubleshooting: Craftsman CMXGWAS020733
Mechanical failure analysis and shop teardown solutions for common operating issues.
Shop Diagnostics & Service Notes
Tear into a cranky Craftsman 3100, and you'll immediately meet the Briggs & Stratton ReadyStart auto-choke mechanism. Instead of a manual choke lever, Briggs uses a bimetallic thermal coil tucked behind the muffler heat shield, connected by a slender steel rod to the carburetor choke plate. When the muffler gets hot, the spring expands and pushes the choke open. But yard dust, dried lawn clippings, and surface rust quickly bind this sliding linkage. If the choke plate sticks open when cold, the engine refuses to start without starter fluid. Worse, if the linkage binds shut when the engine warms up, it floods the combustion chamber with raw fuel, spews black exhaust soot, and fouls the spark plug in under ten minutes. Clean and lubricate that ReadyStart linkage pivot every spring with dry graphite spray—never use sticky oil that attracts dirt.
The factory axial wobble-plate pump is built strictly for residential duties, with an expected lifespan around 60 to 100 total operating hours. Inside the aluminum casting, a swash plate spins at 3,400 RPM on the 3/4-inch horizontal crankshaft, driving three spring-returned stainless pistons through tight water seals. The pump crankcase is sealed at the factory with a few ounces of gear lube and has zero drain plugs. When abrasive hose grit slips through, it scores the piston plungers and erodes the internal unloader seat. Once that seat washes out, working pressure drops permanently to 600 PSI. Don't waste money trying to rebuild a scored axial pump. You can unbolt the whole assembly and slap on an aftermarket 3/4-inch horizontal replacement axial or mini-triplex pump in twenty minutes for under $80.
The stock garden hose connection is an accident waiting to happen. Craftsman uses a brittle composite or thin pot-metal 3/4-inch GHT garden hose swivel fitting. Tugging a heavy 5/8-inch hose across a yard puts massive bending torque on this plastic fitting, snapping it flush with the pump casing or stripping out the soft threads. Remove that stock plastic adapter right out of the box and replace it with a machined brass 3/4-inch GHT female-to-NPT swivel with an integrated 40-mesh stainless steel filter screen. Run a flexible 3-foot rubber whip hose with quick connects between the pump and your garden hose to absorb side loads and protect your pump manifold.
Frequently Asked Questions: Craftsman CMXGWAS020733
Quick mechanical answers for troubleshooting connections, leaks, and upgrades.
Why is my Craftsman 3100 pressure washer so hard to start with the ReadyStart auto-choke?
The bimetallic thermal spring or mechanical sliding rod behind the muffler is sticking, preventing the choke plate from snapping shut for a cold start. Pull the air cleaner cover, check that the choke plate closes completely when the engine is cold, and clean the linkage pivots with carb cleaner and dry graphite spray.
Why is the engine blowing black smoke and sputtering after running for 5 minutes?
The ReadyStart auto-choke linkage has bound up and is failing to open as the engine heats up. This suffocates the engine with raw gas, coating the spark plug in black carbon soot until the engine stalls. Free up the thermal actuator linkage behind the muffler heat shield.
Can I replace the axial pump on my Craftsman CMXGWAS020733 if it stops building pressure?
Yes, the Briggs & Stratton 208cc engine features a standard 3/4-inch horizontal keyed shaft with a 4-bolt engine mounting pattern. You can buy a universal 3/4-inch replacement axial pump online for under $80 and bolt it on in 20 minutes with basic hand tools.
How do I fix a leaking or cracked garden hose inlet on the Craftsman 3100 pump?
Unscrew the cracked factory plastic inlet adapter using a wrench and throw it away. Install a heavy-duty machined brass 3/4-inch GHT female to male NPT swivel fitting wrapped in two layers of PTFE tape, and make sure the stainless cone filter screen is clean.
What is the maximum recommended surface cleaner size for this Craftsman 2.3 GPM washer?
Stick with a 10-inch or 11-inch surface cleaner. True continuous flow on this model is 2.25 GPM, which caps your effective deck diameter at 10 to 11 inches under the 4-inch-per-GPM rule. Anything larger spreads the water stream too thin, causing tip stall and leaving patchy, dirty lines across concrete.