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  3. Premium 6B4-45300-11-4D Lower Unit Assembly for Yamaha 15HP 2-Stroke Outboard Motor
6F5
PROPELLER

Premium 6B4-45300-11-4D Lower Unit Assembly for Yamaha 15HP 2-Stroke Outboard Motor

The 6B4-45300-11-4D Lower Unit Assembly is specifically engineered for the legendary Yamaha 15HP 2-Stroke Enduro series (6B4/E15D models). Unlike standard leisure-grade gearboxes, this commercial-grade assembly is built to withstand continuous, high-intensity operations in challenging marine environments

Premium 6B4-45300-11-4D Lower Unit Assembly for Yamaha 15HP 2-Stroke Outboard Motor | Long Shaft Gearcase Assy
100% Brand New OEM-Quality Match: Direct replacement for Yamaha part number 6B4-45300-11-4D / 6B4-45300-11.
Commercial Enduro Grade: Engineered specifically for Yamaha 6B4 (E15D) series, built to endure heavy-duty marine environments.
Ready-to-Install Module: Complete bolt-on assembly including pre-shipped gears, bearings, oil seals, and water pump.
Superior Corrosion Protection: Marine-grade aluminum alloy with multi-layer coating and built-in anode position for maximum saltwater durability.
Smooth Shifting & Performance: Precision-machined alloy steel gears ensure low noise, high torque transfer, and minimal hydrodynamic drag.
Specifications:

Parameter
Specification Details
Brand Compatibility
Fits Yamaha Outboard Motors
Engine Capacity
15HP (15 Horsepower), 2-Stroke
Model Code Match
6B4 / E15D / 15D (Enduro / Commercial Series)
OEM Part Number
6B4-45300-11-4D, 6B4-45300-11, 6B4-45300
Shaft Length
L Shaft (Long Shaft) - Fits approx. 20" Transom
Color/Finish
Official Marine Dark Bluish Gray (-4D)
Package Includes
Complete Gearcase Housing, Driveshaft, Propeller Shaft, Gear Set, Clutch Dog, Water Pump Base & Impeller


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