GRACO 25N637 – G-FORCE II 4240 HA-DD Pressure Washer, 4200 PSI, 4 GPM w/ Honda Engine & AR Pump

GRACO 25N637 – G-FORCE II 4240 HA-DD Pressure Washer, 4200 PSI, 4 GPM w/ Honda Engine & AR Pump

Ideal for remodelers & property maintenance cleaning needs, the G-Force II 4240 KA-DD pressure washer is the best choice for medium duty applications. It’s light, compact, and is the perfect choice when you need consistent reliability for the occasional cleaning job.

Kohler® Engine

Reliable, powerful & easy-to-start

Reliable, AR Triplex Plunger Water Pump

100% Heavy-Gauge Aluminum Frame

Up to 40% lighter than steel frames

Corrosion resistant to water and chemicals

Standard on all Graco models

Lifetime Warranty

EZ Start Pressure Relief For Easier Starting

Standard Graco feature

Allows water bypass pump to eliminate pressure build-up in the system

No need to pull the gun trigger while starting the washer

Direct Drive

Compact design with fewer components and lighter weight

Pump is connected directly to the drive shaft of the engine

Pump rpm matches that of the engine (usually around 3500 rpm)

Additional Specifications

Max Working Pressure: 4200 PSI (29 MPa, 290 Bar)

Flow Rate: 4.0 GPM

Crankcase Oil Capacity: 16.0 oz (0.47 L)

Engine Brand	Honda
Engine Model	GX390
Fuel Tank Capacity (qt)	6.9
Hose Inlet Diameter (in)	3/8
Hose Length (ft)	50
Includes	Professional-Grade Pressure Washer Spray Gun with Quick Connects, 36 in Pressure Washer Wand with Quick Connect, 3/8 in x 50 ft Non-Marking Pressure Washer Hose, 4 ft Chemical Injector Hose with Strainer, 0° Red Pressure Washer Tip, 15° Yellow Pressure Washer Tip, 25° Green Pressure Washer Tip, Black Chemical Pressure Washer Tip
Maximum Flow Rate (GPM)	4
Maximum Fluid Pressure (psi)	4200
Maximum Operating Temperature (°F)	145
Maximum Working Pressure (MPa)	29
Maximum Working Pressure (psi)	4200
Model	G-Force II
Motor Drive Type	Direct Drive
Pump Brand	AR
Pump Type	Triplex Plunger
Recommended Weekly Usage (Hours)	20-30
Series	4240
Type	Gas Pressure Washer
Weight (lb)	102

Compatible Equipment

G-FORCE II pressure washer systems

Pump 17Z102

Pump 17Z103

Pump 17Z104

Related Parts

25N640

25N641

25N677 – G-FORCE II 4040 HG-DD Pressure Washer, 4000 PSI, 4 GPM w/ Honda Engine & GP Pump

25N681, 25N677K

25N678 – G-FORCE II 4040 HC-DD Pressure Washer, 4000 PSI, 4 GPM w/ Honda Engine & CAT Pump

25N682, 25N678K

25N679 – G-FORCE II 4040 HG-BD Pressure Washer, 4000 PSI, 4 GPM w/ Honda Engine & GP Pump

25N683 – G-Force II 4040 HG-BD Pressure Washer, CAT Brass Triplex pump, 4000 PSI

This is a 4240 model pressure washer with Honda engine, AR pump, and direct drive system.0 GPM unit with Honda engine, AR pump, and direct drive configuration. 25N637 appears as a model number in the header for compatible models that use the direct-drive parts shown in this diagram, but no specific specifications for this model are provided on this page 25N637 is listed as a compatible model number for the pump parts shown in this diagram. The crankcase oil capacity specification applies to the pump used with this model.

Reference Manuals

3A6588 (Page 2) Pressure Washers, Operation, Repair, Parts