# 19291-ZW5-000 Honda Relief Valve | Genuine Used Part

🔧 Product Description

  

Genuine Honda BF115A / BF130A Cooling-System Relief Valve - Part Number: 19291-ZW5-000

  

A genuine used Honda Marine cooling-water relief valve for BF115A and BF130A four-stroke outboards.

  

Although often grouped with lubrication components, this part is a cooling-system pressure-relief or bypass valve rather than an engine-oil-pressure valve. It works with spring 19292-ZW5-000 to regulate water flow and pressure through the engine cooling passages.

  

⚙️ Key Features

  

• Genuine Honda Marine relief valve

• Correct part number 19291-ZW5-000

• Cooling-system component, not an oil-pressure valve

• Used on BF115A and BF130A engines

• Works with the matching spring and retainer

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 19291-ZW5-000 established Honda relief-valve reference

• No confirmed direct supersession

  

OEM / Related Numbers:

  

• 19291-ZW5-000

• 19291ZW5000

• 19292-ZW5-000 relief-valve spring

• 19296-ZW5-000 related retainer / cover component

• 19380-ZW5-000ZA related oil-water-jacket cover

• 19382-ZW5-000 related cover gasket

  

Aftermarket / Verified Equivalents:

  

• No aftermarket relief-valve equivalent

• Used genuine Honda valves and new OEM parts are the correct replacement

• Springs and seals should be replaced with the correct Honda specification

  

🚤 Compatibility

  

Commonly used on:

  

• Honda BF115A

• Honda BF130A

• ZW5-series cylinder-block cooling systems

  

Typically suits:

  

• BF115A LA / XA and related model codes

• BF130A LA / LCA / XA / XCA and related model codes

• BZBD and BZBE engine-number families

  

• HP Range: 115HP - 130HP

• Engine Type: 2.2L inline-four four-stroke outboard

• Year Range: Approximately 1999 - 2007

• Fitment Requirement: Inspect the spring, seat and cooling passages during installation

  

🔌 Function

  

The valve opens or closes according to cooling-water pressure, helping control bypass flow and maintain the intended cooling-system pressure.

  

Common signs of failure:

  

• Overheating at higher RPM

• Excessive or insufficient cooling-water pressure

• Valve stuck open from corrosion or debris

• Weak or broken relief spring

• Cooling-system warning or unstable engine temperature

  

📦 Condition

  

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated

## Details

- **Price:** 3.25 AUD
- **Vendor:** Sawley's Auto and Marine
- **Tags:** Sawley’s AAM Used Parts – Oil Pumps & Components | Engine Lubrication Systems

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 3.25 AUD | In stock |

## Images

- 19291-ZW5-000 Honda Relief Valve | Genuine Used Part
- 19291-ZW5-000 Honda Relief Valve | Genuine Used Part
- 19291-ZW5-000 Honda Relief Valve | Genuine Used Part
- 19291-ZW5-000 Honda Relief Valve | Genuine Used Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/19291-zw5-000-honda-relief-valve-genuine-used-part)
> Updated: 2026-07-20