# 93210-86M38 Yamaha O-Ring | Genuine OEM Yamaha Outboard Part

🔧 Product Description

  

Genuine Yamaha Water Pump Housing O-Ring - Part Number: 93210-86M38

  

A genuine Yamaha large water-pump housing O-ring for selected 80HP to 250HP four-stroke and 100HP to 300HP two-stroke outboards.

  

The O-ring seals the pump housing or cartridge assembly to the lower-unit water-pump base, preventing cooling water from escaping around the housing.

  

⚙️ Key Features

  

• Genuine Yamaha OEM water-pump housing O-ring

• Correct Yamaha part number 93210-86M38

• Used on Yamaha large and V6 lower units

• Maintains cooling-water suction and discharge pressure

• Sierra and Outboard Spares replacements available

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 93210-86M38 current Yamaha OEM service reference

  

OEM / Related Numbers:

  

• 93210-86M38

• 93210-86M38-00

• 9321086M3800

• 93210-37M67 related water-pump O-ring

• 61A-44311-series related water-pump housing

• 61A-W0078-series related water-pump kit

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-7485

• Outboard Spares: OSWGM38

• Direct aftermarket water-pump housing O-ring: 93210-86M38

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha V4 and V6 two-stroke water pumps

• Yamaha HPDI lower units

• Yamaha large four-stroke gearcases

  

Typically suits:

  

• Engine models:

• Yamaha 100A

• Yamaha 115A, E115A, 115B and 115C

• Yamaha 130B

• Yamaha 140A and 140B

• Yamaha 150A, 150C, 150F and 150G

• Yamaha D150H

• Yamaha 175A, 175B, 175D and 175F

• Yamaha 200A, 200B, 200C, 200F and 200G

• Yamaha ProV 200

• Yamaha 220A

• Yamaha 225A, 225B, 225C, 225D, 225F and 225G

• Yamaha 250A, 250B and 250G

• Yamaha Z150, Z175, Z200, Z250 and Z300 HPDI

• Yamaha F80 through F250 four-stroke gearcases where specified

  

• HP Range: Approximately 80HP - 300HP

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

• Year Range: Approximately 1986 - 2019, dependent on water-pump housing

  

🔌 Function

  

The O-ring seals the pump housing against the lower water-pump base so the impeller can maintain cooling-water pressure.

  

Common signs of failure:

  

• Weak or intermittent tell-tale stream

• Water leaks around the pump housing

• Engine overheats after pump servicing

• O-ring becomes flattened, cut or twisted

• Pump housing will not seat evenly against the base

  

📦 Condition

  

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 14.0 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 14.00 AUD | In stock |

## Images

- 93210-86M38 Yamaha O-Ring | Genuine OEM Yamaha Outboard Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/93210-86m38-o-ring)
> Updated: 2026-07-11