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Lower Unit Gearcase Assembly 6B4-45300-11-4D for Yamaha Outboard Engine 2-Stroke 9.9HP 15HP

Lower Unit Gearcase Assembly 6B4-45300-11-4D for Yamaha Outboard Engine 2-Stroke 9.9HP 15HP

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Product Details

Lower Unit Gearcase Assembly 6B4-45300-11-4D for Yamaha Outboard Engine 2-Stroke 9.9HP 15HP

Replacement Part Number: 6B4-45300-11-4D, 6B445300114D

Application:
Fit For Yamaha Outboard Engine 2-Stroke 9.9HP 15HP

Product Highlights
Brand: FridayParts
Compatible Engine Brand: For Yamaha
Engine Number: 15HP, 9.9HP
Replacement Part Number: 6B4-45300-11-4D, 6B445300114D
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user
Chris Holland
Reviewed on 24/09/2025
Runs Smooth and Strong

Installed this lower unit on my Yamaha 9.9HP and it’s perfect. Shifts smooth, no weird noises, and the prop spins just right. Swap was straightforward and everything lined up perfectly. Boat runs like new again—super happy with this replacement!

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