# 93210-59MG7 Yamaha O-Ring | Genuine OEM Yamaha Outboard Part

🔧 Product Description

  

Genuine Yamaha Water Pump Housing O-Ring - Part Number: 93210-59MG7

  

A genuine Yamaha lower-unit O-ring for selected 25HP to 60HP water-pump housings.

  

The O-ring seals the pump housing, pump base or lower-unit water passage, preventing air from entering the impeller chamber and stopping pressurised cooling water from escaping around the housing.

  

⚙️ Key Features

  

• Genuine Yamaha OEM water-pump housing O-ring

• Correct Yamaha part number 93210-59MG7

• Used on selected 25HP to 60HP outboards

• Resistant to seawater, heat and pump pressure

• Sierra, Recmar and aftermarket replacements available

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 93210-59MG7 current Yamaha water-pump O-ring reference

  

OEM / Related Numbers:

  

• 93210-59MG7

• 93210-59MG7-00

• 9321059MG700

• Water-pump housing seal

• Lower-unit pump-housing O-ring

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-71334

• Recmar: REC93210-59MG7

• Marine Spare Parts: AM93210-59MG7

• SeaSierra: 93210-59MG7 replacement O-ring

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha water-pump housing assemblies

• Mid-range lower-unit pump bases and cooling-water passages

  

Typically suits:

  

• Engine models:

• Yamaha 25HP outboards

• Yamaha 30HP outboards

• Yamaha 40HP two-stroke and four-stroke

• Yamaha E40X

• Yamaha F40

• Yamaha 50HP two-stroke

• Yamaha C50

• Yamaha F50 four-stroke

• Yamaha T50 high-thrust

• Yamaha F60 four-stroke

• Yamaha T60 high-thrust

• Parsun F40 lower units using the Yamaha-pattern pump housing

  

• HP Range: 25HP - 60HP

• Engine Type: Yamaha two-stroke and four-stroke outboard

• Year Range: Approximately 1990s onward, dependent on pump-housing design.

  

🔌 Function

  

The O-ring seals the water-pump housing so the impeller can create the suction and discharge pressure required to circulate cooling water.

  

Common signs of failure:

  

• Weak tell-tale stream

• Engine overheats at idle

• Air enters around the pump housing

• Water pressure remains low after fitting a new impeller

• O-ring is flattened, swollen or pinched

  

📦 Condition

  

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 11.4 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 11.40 AUD | In stock |

## Images

- 93210-59MG7 Yamaha O-Ring | Genuine OEM Yamaha Outboard Part
- 93210-59MG7 Yamaha O-Ring | Genuine OEM Yamaha Outboard Part
- 93210-59MG7 Yamaha O-Ring | Genuine OEM Yamaha Outboard Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/93210-59mg7-o-ring)
> Updated: 2026-07-11