688-45384-00 Yamaha Nut, Prop Shaft | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Gearcase Bearing Carrier Spanner Nut - Part Number: 688-45384-00

A genuine Yamaha threaded retaining nut used to secure the propeller-shaft bearing carrier within selected mid-range lower-unit housings.

Although commonly described as a propeller-shaft nut, this component is the large spanner-style bearing-carrier retaining nut installed inside the gearcase.

⚙️ Key Features

• Genuine Yamaha OEM bearing-carrier retaining nut

• Correct Yamaha part number 688-45384-00

• Secures the propeller-shaft bearing carrier in the gear housing

• Used on Yamaha 3-cylinder and 4-cylinder gearcases

• Pro Marine, PROMT and direct aftermarket replacements available

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 688-45384-02 → Supersedes 688-45384-01

• 688-45384-01 → Supersedes 688-45384-00

• 688-45384-00 earlier Yamaha bearing-carrier nut reference

OEM / Related Numbers:

• 688-45384-00

• 688-45384-00-00

• 688453840000

• 688-45384-01

• 688-45384-01-00

• 688-45384-02

• 688-45384-02-00

• 688-45383-02 related tab washer

• 688-45332-series related bearing carrier

Aftermarket / Verified Equivalents:

• Pro Marine: 688N

• PROMT Parts: PP-688-45384-00

• SouthMarine: 688-45384 replacement spanner nut

• Yamasco / YAMADURA: 688-45384 replacement nut

🚤 Compatibility

Commonly used on:

• Yamaha 3-cylinder and 4-cylinder lower-unit bearing carriers

Typically suits:

• Engine models:

• Yamaha 50HP gearcases using the 688 carrier nut

• Yamaha 60HP

• Yamaha 70HP

• Yamaha 75HP

• Yamaha 80HP

• Yamaha 85HP

• Yamaha 90HP

• Yamaha 115HP

• Yamaha 130HP

• Yamaha L130 / S130 lower-unit applications

• HP Range: 50HP - 130HP

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

• Year Range: Approximately 1984 onward, dependent on bearing-carrier diameter

🔌 Function

The nut threads into the gearcase and retains the propeller-shaft bearing carrier, seals and reverse-gear assembly in their correct position.

Common signs of failure:

• Nut is corroded or seized in the gearcase

• Spanner slots are broken or damaged

• Bearing carrier moves within the housing

• Threads are stripped or heavily corroded

• Nut must be removed during propeller-shaft or carrier servicing

📦 Condition

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging