64k-45300-04-na yamaha 20" long shaft gearbox | Genuine Used Part

🔧 Product Description

Genuine Yamaha V150 / VX150 / VZ150 20-Inch Standard-Rotation Gearcase - Part Number: 64K-45300-04-NA

A genuine Yamaha 20-inch standard-rotation lower unit primarily associated with V150, VX150 and VZ150 V6 two-stroke outboards. The NA suffix identifies the unpainted or service-finish assembly. Related 175HP and 200HP V6 gearcases share architecture but use different prefix and internal specifications.

⚙️ Key Features

• Genuine Yamaha V6 complete gearcase
• Correct part number 64K-45300-04-NA
• Approximately 20.3-inch long shaft
• Standard propeller rotation
• Primary fitment V150 / VX150 / VZ150

🚤 Compatibility

• Yamaha V150 two-stroke
• Yamaha VX150 EFI two-stroke
• Yamaha VZ150 HPDI two-stroke
• Selected P150 / Pro V 150 applications using the 64K case
• Approximate application era: 1996-2009
• 20-inch standard-rotation configuration

🔌 Function

The lower unit transfers V6 power to the propeller, selects forward and reverse and supplies cooling water through the 20-inch midsection.

⚠️ Common Signs of Failure

• Housing family is confused with 175HP / 200HP prefixes
• Gear oil contains water
• Clutch dog slips
• Propeller shaft is bent
• Driveshaft splines wear
• Skeg or cavitation plate is damaged

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 64K-45300-04-NA supersedes or replaces earlier 64K-45300-02-NA in applicable catalogues
• Related 64K suffix revisions include 01, 02 and 03
• 64M and other prefix families identify different horsepower or gearcase configurations

OEM / Related Numbers

• 64K-45300-04-NA
• 64K-45300-02-NA
• Related 20-inch V6 driveshaft
• Related V150 gear set, clutch dog and propeller-shaft carrier
• Related Yamaha V6 water-pump and seal kits

Aftermarket / Verified Equivalents

• SEI and specialist remanufactured Yamaha V6 150HP lower units where supported
• Southcentral and other remanufactured V150 / VZ150 20-inch units
• Aftermarket seal, bearing, gear and water-pump parts

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated