# 63P-45378-00 Yamaha Nipple | Genuine OEM Yamaha Outboard Part

🔧 Product Description

  

Genuine Yamaha Hose Nipple - Part Number: 63P-45378-00-00

  

A genuine Yamaha OEM hose nipple used in Yamaha lower-casing / cooling-water hose connection assemblies. This small fitting provides a secure hose connection point in the gearcase or lower-casing water passage area.

  

⚙️ Key Features

  

• Genuine Yamaha OEM hose nipple

• Correct Yamaha part number 63P-45378-00-00

• Used on Yamaha lower-casing drive diagrams

• Cooling hose / water passage connection fitting

• Small but important replacement part for broken, blocked or corroded hose nipples

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 63P-45378-00-00 Yamaha nipple, hose reference

• 63P-45378-00 short Yamaha nipple format

  

OEM / Related Numbers:

  

• 63P-45378-00-00

• 63P-45378-00

• 63P453780000

• 63P4537800

• 93210-07540-00 related O-ring used with some 63P hose nipple listings

• 93210-07540 related Yamaha O-ring reference

  

Aftermarket / Verified Equivalents:

  

• Direct confirmed aftermarket cross should be matched by OEM number 63P-45378-00-00

• Yamaha OEM replacement nipple supplied as 63P-45378-00-00

• Related Yamaha hose nipple family: 6E5-45378-00-00 for different Yamaha gearcase applications

• Generic Yamaha speedometer / cooling hose nipple repair fittings exist, but 63P-45378-00-00 should not be substituted without confirming thread, hose size and lower-casing diagram

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha lower-casing drive assemblies

• Yamaha F150 / VF150 hose nipple locations

• Cooling-water / speedometer hose connection points depending on model diagram

  

Typically suits:

  

• Engine models:

• Yamaha F150AET applications where 63P-45378-00 is specified

• Yamaha F150LA applications where 63P-45378-00 is specified

• Yamaha F150LB applications where specified

• Yamaha F150TLR applications where specified

• Yamaha F150TXR applications where specified

• Yamaha F150XA applications where specified

• Yamaha VF150LA applications where specified

• Yamaha VF150XA applications where specified

• Yamaha 63P-series lower-casing assemblies using this hose nipple

  

• HP Range: commonly 150HP where specified

• Engine Type: Yamaha four-stroke outboard lower-unit / lower-casing assembly

• Year Range: model-specific F150 / VF150 applications, commonly 2004 onward depending on model

• Component Type: Hose nipple / water passage fitting

  

🔌 Function

  

The hose nipple provides a fixed connection point for a small cooling-water or pressure hose so water can flow through the intended passage without leaks or disconnection.

  

Common signs of failure or service need:

  

• Broken nipple during lower-unit service

• Corrosion or salt blockage inside fitting

• Hose loose or unable to seal

• Water leakage at hose connection

• Blocked speedometer or water-pressure passage

• Damaged threads in lower casing

• Hose nipple missing after repair work

  

📦 Condition

  

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 10.79 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 10.79 AUD | In stock |

## Images

- 63P-45378-00 Yamaha Nipple | Genuine OEM Yamaha Outboard Part
- 63P-45378-00 Yamaha Nipple | Genuine OEM Yamaha Outboard Part
- 63P-45378-00 Yamaha Nipple | Genuine OEM Yamaha Outboard Part
- 63P-45378-00 Yamaha Nipple | Genuine OEM Yamaha Outboard Part
- 63P-45378-00 Yamaha Nipple | Genuine OEM Yamaha Outboard Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/63p-45378-00-nipple)
> Updated: 2026-07-11