99999-03936-00 Yamaha Housing | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Lower Water Pump Housing Set - Part Number: 99999-03936-00

A genuine Yamaha replacement lower water-pump housing set for selected 25HP to 60HP two-stroke and four-stroke outboards.

The housing forms the lower portion of the impeller chamber and supports the associated driveshaft sealing components beneath the water pump.

⚙️ Key Features

• Genuine Yamaha OEM water-pump housing set

• Correct Yamaha part number 99999-03936-00

• Supersedes water-pump housing set 6H3-WS443-00

• Used on selected Yamaha 25HP to 60HP gearcases

• Complete replacement housing rather than a bare gasket

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 99999-03936-00 → Supersedes 6H3-WS443-00-00

• 6H3-WS443-00-00 earlier Yamaha water-pump housing set

OEM / Related Numbers:

• 99999-03936-00

• 999990393600

• 6H3-WS443-00

• 6H3-WS443-00-00

• 6H3-44352-00 related impeller

• 6H3-W0078-series related water-pump repair kit

Aftermarket / Verified Equivalents:

• Aftermarket lower housing set replacing 6H3-WS443-00

• Included in selected complete 6H3-series water-pump kits

🚤 Compatibility

Commonly used on:

• Yamaha 6H3-series lower water-pump assemblies

Typically suits:

• Engine models:

• Yamaha 25B selected gearcases

• Yamaha 50G

• Yamaha 60F

• Yamaha F50A

• Yamaha FT50B

• Yamaha FT50C

• Yamaha FT50G

• Yamaha FT50J high-thrust applications

• Selected Yamaha F40, F50 and F60 gearcases using the same lower housing

• HP Range: Commonly 25HP - 60HP

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

• Year Range: Gearcase dependent

🔌 Function

The housing forms the lower water-pump base and supports the driveshaft seals while separating the cooling-water chamber from the gearcase.

Common signs of failure:

• Lower pump base is corroded or distorted

• Gear oil leaks beneath the water pump

• Engine overheats despite new upper pump components

• Seal bores are worn or damaged

• Gearcase fails pressure or vacuum testing

📦 Condition

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging