Honda WB20 2-Inch General Purpose Water Pump with Honda GX120 118cc Engine LEAKING Error Fix: Pump Leaking Water

Water leaking from the pump housing — the mechanical seal between the engine and pump volute may be worn and needs replacement, check for cracked volute housing, loose drain plug, or damaged hose connections

Medium severity2 fixes available✨ Free fix available

Quick Answer

Error LEAKING on the Honda WB20 2-Inch General Purpose Water Pump with Honda GX120 118cc Engine means: Pump Leaking Water. The top-ranked community fix is “Replace Mechanical Seal and Inspect Pump Housing” (hard difficulty, ~90 min, DIY cost: $15-$30). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · water pump

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many water pump repairs can be done safely at home, consider hiring a qualified technician if:

The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $150-$250.

Other Honda WB20 2-Inch General Purpose Water Pump with Honda GX120 118cc Engine Error Codes

Carburetor Clogged

Pump Cavitation

Engine Will Not Start

2 fixes

LOW FLOW

Low Water Flow Output

2 fixes

RUN DRY DAMAGE

Pump Ran Without Water

2 fixes

SURGING

Engine Surges or Hunts

2 fixes

WONT PRIME

Pump Will Not Prime

2 fixes

People Also Ask About Honda WB20 2-Inch General Purpose Water Pump with Honda GX120 118cc Engine Error LEAKING

What does error code LEAKING mean on a Honda WB20 2-Inch General Purpose Water Pump with Honda GX120 118cc Engine?

Error code LEAKING on the Honda WB20 2-Inch General Purpose Water Pump with Honda GX120 118cc Engine means: Pump Leaking Water. Water leaking from the pump housing — the mechanical seal between the engine and pump volute may be worn and needs replacement, check for cracked volute housing, loose drain plug, or damaged hose connections

How do I fix error code LEAKING on my Honda WB20 2-Inch General Purpose Water Pump with Honda GX120 118cc Engine?

The most successful fix is "Replace Mechanical Seal and Inspect Pump Housing" (hard difficulty, ~90 minutes). Estimated DIY cost: $15-$30. HomeMD has 2 community-ranked fixes for this error.

Is error code LEAKING on a Honda WB20 2-Inch General Purpose Water Pump with Honda GX120 118cc Engine serious?

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Can I fix Honda WB20 2-Inch General Purpose Water Pump with Honda GX120 118cc Engine error LEAKING myself?

Yes — the top-ranked community fix ("Replace Mechanical Seal and Inspect Pump Housing") is rated hard difficulty and takes about 90 minutes. Tools needed: 10mm socket wrench, Seal puller, Clean cloth, Flathead screwdriver.

How much does it cost to repair Honda WB20 2-Inch General Purpose Water Pump with Honda GX120 118cc Engine error LEAKING?

DIY cost: $15-$30. Professional repair typically costs $150-$250. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Honda WB20 2-Inch General Purpose Water Pump with Honda GX120 118cc Engine have?

The Honda WB20 2-Inch General Purpose Water Pump with Honda GX120 118cc Engine has 7 other known error codes, including: CARBURETOR CLOGGED (Carburetor Clogged), CAVITATION (Pump Cavitation), ENGINE WONT START (Engine Will Not Start), LOW FLOW (Low Water Flow Output), RUN DRY DAMAGE (Pump Ran Without Water), and 2 more.

What other error codes does the Honda WB20 2-Inch General Purpose Water Pump with Honda GX120 118cc Engine have?

The Honda WB20 2-Inch General Purpose Water Pump with Honda GX120 118cc Engine has 7 other known error codes:

CARBURETOR CLOGGED — Carburetor Clogged (2 fixes)
CAVITATION — Pump Cavitation (2 fixes)
ENGINE WONT START — Engine Will Not Start (2 fixes)
LOW FLOW — Low Water Flow Output (2 fixes)
RUN DRY DAMAGE — Pump Ran Without Water (2 fixes)
SURGING — Engine Surges or Hunts (2 fixes)
WONT PRIME — Pump Will Not Prime (2 fixes)

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