Yamaha F150, F150A, F150B

GEAR CASE LOWER LEG YAMAHA F150 F150A F150B 63P-45300-12-8D

Product Analysis: Yamaha F150 Lower Unit (Part # 63P-45300-12-8D)

This listing is for a replacement lower unit assembly (gearcase) for Yamaha F150 outboards.

Key Details:

Part Number: 63P-45300-12-8D
- This is a critical identifier. This is a genuine Yamaha OEM part number.
Compatibility: Listed for Yamaha F150, F150A, F150B models.
Condition: The description you provided earlier (“New: A brand-new, unused…”) confirms this is a brand new, genuine Yamaha OEM part.

What This Means & Important Considerations:

OEM Quality: This is the official part from Yamaha, ensuring perfect fit, finish, and performance. It is the highest quality replacement you can buy.
Shaft Length Not Specified: The part number 63P-45300-12-8D does not inherently indicate the shaft length (20″, 25″, or 30″). The “-12-” segment in the number often correlates to a specific length and model year.
- You must verify this is the correct length for your boat. A 20″ unit will not work correctly on a boat requiring a 25″ unit.
Warranty: As a new Yamaha OEM part, it likely comes with Yamaha’s standard 1-year limited warranty. The mention of a “3-year warranty” in your previous context would be exceptional for OEM and should be confirmed with the seller.
Core Charge: Since this is a new OEM part, there is typically no core charge (you do not need to return your old unit).

Critical Next Steps Before You Buy:

Confirm Shaft Length: This is the most important step. Use your engine’s serial number to look up the correct OEM part number for your specific engine. Do not rely solely on the “F150A/B” description.
Verify Warranty: Double-check the seller’s listing or contact them to confirm the exact warranty terms (1-year vs. 3-year).
What’s Included: Confirm if the water pump kit and necessary seals/gaskets are included or if they must be purchased separately.

Summary: This is a listing for a high-quality, new Yamaha OEM lower unit. The primary caution is to absolutely confirm the shaft length using your engine’s serial number to ensure this specific part (63P-45300-12-8D) is the correct one for your application.