Easy starting Honda OHV commercial engine
Easy starting Honda OHV commercial engine

The durable Honda GX series commercial grade engine is easy starting and provides ample power for the toughest conditions.

Durable silicon carbide mechanical seal
Durable silicon carbide mechanical seal

The WB20 features abrasion-resistant silicone-carbide seals for extended wear.

4 vane high efficiency impeller
4 vane high efficiency impeller

The WB20's exclusive, Honda-designed 4 vane impeller offers improved performance and high efficiency.

Cast iron volute
Cast iron volute

The rigid-mount cast iron volute reduces case wear, increasing the life of the pump.

Heavy duty full frame protection
Heavy duty full frame protection

Protects the pump, while offering a convenient tie down location for transport.

Isolation mounted engine and pump
Isolation mounted engine and pump

High performance mounts minimize vibration, keeping the pump from “walking" away or “burying" itself in soft soil conditions. The reduced vibration also reduces wear on components, increasing the pump's durability.

Protected by Honda Oil Alert<sup>&reg;</sup>
Protected by Honda Oil Alert®

Protects the pump by shutting the engine off when low oil is detected.

3 year residential/commercial warranty
3 year residential/commercial warranty

You can rest easy, knowing your pump is covered from top to bottom for 3 full years.

Large strainer
Large strainer

The strainer allows up to 8 mm (5/16 in.) solids to pass through, helping to prevent clogging.


Engine GX120
Displacement 118cc
Bore and stroke 2.4" x 1.7"
Compression Ratio 8.5:1
Oil Alert Std
Pump Type Centrifugal, Self-priming
Volute Rigid Mounted Cast Iron
Impeller 4 Vane Cast Iron
Mechanical Seal (Pump case / impeller) Silicon Carbide/Silicon Carbide
Priming time 110 sec @ 16.4 ft.
Drive system Direct
Discharge capacity 164 gal/min
Suction port diameter 2" NPT
Discharge port diameter 2" NPT
Total head lift 105 ft.
Suction head lift 25 ft.
Maximum pressure 45 psi
Solids handling N/A
Dimensions (LxWxH) 19.3" x 14.4" x 16.5"
Dry weight 44 lb.
Fuel Capacity 0.53 gal
Run Time @ Max Discharge 1.7 hr
Strainer Part # 78325-YG3-000
Residential Warranty 3 years
Commercial Warranty 3 years


A wide variety of hose kits, couplers, adaptors, and other accessories are available.


Serial Number


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(2 Customer Reviews)
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Home owner

Model Reviewed: WB20 Sunday, May 19, 2019
Ovalo, TX
Type of use:  Home use
I needed this pump for my septic tank. It started on the very first pull and performed beautifully each time I have used it. This pump is relative quiet really moves the water. I highly recommend this Honda pump. Can't say enough good things about it.

Excellent pump, BUT...

Model Reviewed: WB20 Thursday, May 25, 2017
Elkins, AR
Type of use:  Home use, Agriculture

This is an excellent pump.  I bought it from a Honda dealer to replace an older off brand 2" pump.  It pumps about 7% more water than the old pump while using about half the fuel the old one did.  It's lightweight, easy to hook up, and to start.  The only complaint I have is the two original water plugs for prime and drain were the wrong thread, and very difficult to remove and tighten, even the first time I used it, and I have experience.  The dealer sent me two new plugs, and they screw in and out easily, and work well.  I think it was a factory mistake on the threading of the original plugs.  The thread on the originals was a little different than the replacement plugs the dealer sent me.

Other than that one problem, it's a great pump from a great dealer, Honda of Russelleville.

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