CANPUMP CF 3647 G Triplex Pressure Washer Pump — 3600 PSI, 4.7 GPM, 1" Gas Shaft Horizontal Replacement with External Unloader

CANPUMP CF 3647 G is a commercial-grade triplex pressure-washer pump delivering up to 3600 psi and 4.7 US gpm with an easy-to-service external unloader.

This horizontal, direct-drive replacement pump fits most 13 hp (390cc class) gasoline engines with a 1" shaft and SAE J609-A mounting. Built with ceramic-coated plungers, forged brass head, and German seals, it’s designed for heavy residential and light commercial cleaning—shipped prefilled with SAE 15W-40 oil and ready to install.

How does this pump handle tough cleaning jobs?

The CF 3647 G uses a triplex plunger design that generates steady, high-pressure output and improved longevity compared with single- or axial-style pumps. It sustains performance across repeated cycles and harsher conditions while protecting internal components from wear.

• Max pressure 3600 psi and max flow 4.7 US gpm for heavy-duty tasks
• Ceramic-coated stainless plungers resist abrasion and prolong life
• Forged brass head and anodized aluminum crankcase for corrosion resistance

What engines and mounts is the CF 3647 G compatible with?

This pump uses the standard SAE J609-A mounting flange and a 1" gas shaft, making it a direct replacement for many 13 hp (390cc-class) engines. It’s a common swap for popular small-engine brands and many commercial pressure-washer frames.

• Fits Honda GX390/GX340, Briggs & Stratton, Generac and similar engines
• Direct-drive horizontal-shaft design with 1" diameter shaft
• Ideal for upgrading or restoring older commercial-grade units

How do the external unloader and maintenance features help me?

The detachable external unloader allows simple pressure adjustment, includes a detergent injector, and has a built-in water filter for everyday convenience. Maintenance is quicker thanks to the sight glass oil indicator and included spare O-rings and parts list.

• Pressure-adjustable external unloader with 3/8" quick-connect outlet
• Detergent tube with strainer included for cleaning flexibility
• Sight glass oil window eliminates dipstick checks and reduces mess

What are the installation and operating limits I should know?

CANPUMP ships the CF 3647 G prefilled with SAE 15W-40 oil and includes installation parts to speed setup. Observe the pump’s inlet/outlet sizes and temperature limits to ensure safe, reliable operation.

• Pump inlet 1/2" NPT-F and outlet 3/8" NPT-F; unloader inlet accepts 3/4" garden hose
• Max RPM 3400 and max inlet temperature 122°F; water inlet pressure 0–50 psi
• Supplied with extra O-rings, detergent tube, and operating manual

Who is this for: The CANPUMP CF 3647 G suits professionals and dedicated homeowners who need a durable replacement or upgrade for a gasoline-powered pressure washer. Choose this pump if you require commercial-style performance, easier maintenance with an external unloader and sight glass, and broad engine compatibility for restoring or enhancing 13 hp (390cc-class) direct-drive machines.