• Yamaha F200–F300 Lower Unit

• The Yamaha F300BETX 300HP Outboard Engine is a high-performance, 4-stroke outboard motor designed for serious boating enthusiasts. Manufactured in Japan, this engine combines cutting-edge technology with robust engineering to deliver exceptional power, reliability, and efficiency for a wide range of marine applications.
  

  Key Specifications

  • Model: Yamaha F300BETX
  • Horsepower: 300 HP
  • Engine Type: 4-Stroke Outboard
  • Shaft Length: 25 inches

  Performance Features

  The F300BETX is engineered to provide superior performance on the water. With its advanced 4-stroke design, this engine offers:

  • High Power Output: Delivers a powerful 300 horsepower, ideal for larger boats requiring significant thrust.
  • Smooth Operation: The 4-stroke technology ensures quieter operation and reduced emissions, making it environmentally friendly.
  • Versatile Applications: Suitable for various boating activities, including fishing, cruising, and water sports.

  • Yamaha F200–F300 Lower Unit

  Replacement Lower Unit

  For those looking to replace their Yamaha 4-stroke lower unit, this high-performance gearcase is designed to fit a wide range of F200 to F300 outboards (2010–present). This complete unit offers factory-level compatibility without the dealership cost.

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  Yamaha F200–F300 Lower Unit

  Key Features of the Lower Unit:

  • Compatibility: Fits select Yamaha F200–F300 4-stroke engines (2010–2024) and supports both 25″ and 30″ shaft length models.
  • Complete Kit: Includes water pump, shift shaft, driveshaft, and internal gears, pre-filled with gear lube for easy installation.
  • Durability: Built to OEM specifications for smooth shifting and long-lasting performance.

  Fitment Overview

  This replacement lower unit is compatible with numerous Yamaha models, including:

  • 25″ Shaft Models (2010–2024): F225XB, F250XB, F300XA, F300XCA, VF200XA, VF250XA, and more.
  • 30″ Shaft Models (2014–2021): F250UCA, F300UCA, F300BETU.

  Why Choose the Yamaha F300BETX?

  • Factory Design: Matches factory Yamaha design for plug-and-play replacement, ensuring a straightforward installation process.
  • Long-Term Durability: Designed for both saltwater and freshwater environments, providing reliable performance over time.
  • Expert Support: Backed by expert assistance for fitment and installation questions.

  Conclusion

  The Yamaha F300BETX 300HP Outboard Engine is the perfect choice for boaters seeking a powerful, reliable, and efficient outboard motor. Whether you’re replacing a lower unit or upgrading your existing engine, this model is designed to meet the demands of serious marine enthusiasts. For more information or to confirm compatibility with your boat, contact us today!

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  OEM Part Numbers Replaced:

  This unit replaces Yamaha part numbers:

  • 6CE-45300-00-8D

  • 6CE-45300-01-8D

  • 6CE-45300-02-8D

  • 6CE-45300-03-8D

  • 6CE-45300-04-8D

  • 6CE-45300-05-8D

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  Fitment Overview:

  This replacement lower unit fits dozens of Yamaha models, including:

  ✅ 25″ Shaft (2010–2024):

  F225XB, F250XB, F300XA, F300XCA, VF200XA, VF250XA, and more.

  ✅ 30″ Shaft (2014–2021):

  F250UCA, F300UCA, F300BETU

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  Why Choose This Lower Unit?

  • Matches factory Yamaha design for plug-and-play replacement

  • Designed for long-term durability in salt and freshwater

  • Shipped quickly and securely to minimize downtime

  • Backed by expert support for fitment and install questions

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Need Help Confirming Fit?

Send us your Yamaha outboard’s model and serial number. Our experts will verify compatibility to ensure the perfect fit.

Which Yamaha outboards is this lower unit compatible with?

This lower unit fits Yamaha F200, F225, F250, F300, and VF200/VF250 4-stroke outboards with a 25-inch shaft and 1.75:1 gear ratio, manufactured between 2010 and 2024. Supported model numbers include F300XA, F250XB, F225XCA, VF250XA, and many more.

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Which engines are not compatible with this lower unit?

This unit does not fit engines that have:

• A two-piece driveshaft

• The TERE (Thrust Enhancing Reverse Exhaust) feature

Always confirm your engine’s specifications before ordering.

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What are the OEM part numbers this unit replaces?

This replacement unit is a direct fit for Yamaha OEM part numbers:

• 6CE-45300-00-8D

• 6CE-45300-01-8D

• 6CE-45300-02-8D

• 6CE-45300-03-8D

• 6CE-45300-04-8D

• 6CE-45300-05-8D

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What years and models are supported by this unit?

This lower unit supports Yamaha outboards from 2010 through 2024, including models like:

• F300XCA, F250XB, F225XCA

• VF250XA, VF200XB, F300XA2
  Full model compatibility includes over 60 configurations. Contact us with your model number for quick confirmation.

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⚙️ What gear ratio does this lower unit use?

This unit features a 1.75:1 gear ratio, which matches the factory standard for many Yamaha 4-stroke 200–300HP outboards with 25-inch shafts.

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️ Is this lower unit pre-assembled and ready to install?

Yes! It comes fully assembled with the driveshaft, shift shaft, water pump, and internal gears. It’s pre-lubed and bolt-on ready — no special tools or modifications needed.

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Can I reuse my old propeller with this lower unit?

Absolutely. This lower unit is compatible with most standard Yamaha-style propellers used on 1.75:1 ratio outboards in the F200–F300 range.

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How can I confirm this will fit my Yamaha engine?

Just send us your engine’s model and serial number, and our team will verify the exact compatibility for you.

⚙️ Which Yamaha engines with a 30″ shaft does this lower unit fit?

This lower unit fits Yamaha F250UCA, F300UCA, and F300BETU 4-stroke outboards with a 30-inch shaft and 1.75:1 gear ratio, manufactured between 2014 and 2021.

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What specific model years are compatible with this 30″ lower unit?

Supported model years include:

• 2021: F250UCA, F300UCA

• 2020: F300UCA

• 2019: F250UCA, F300UCA

• 2018: F250UCA, F300UCA

• 2017: F250UCA, F300UCA

• 2016: F250UCA, F300UCA, F300BETU

• 2015: F250UCA, F300UCA

• 2014: F250UCA, F300UCA

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Does this 30″ unit fit Yamaha engines with TERE or two-piece driveshafts?

No. This lower unit is not compatible with Yamaha outboards that feature:

• TERE (Thrust Enhancing Reverse Exhaust)

• A two-piece driveshaft design

Always verify your engine specs before purchase.

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Can I use this unit to replace Yamaha OEM parts?

Yes. This unit directly replaces Yamaha OEM part numbers:

• 6CE-45300-00-8D

• 6CE-45300-01-8D

• 6CE-45300-02-8D

• 6CE-45300-03-8D

• 6CE-45300-04-8D

• 6CE-45300-05-8D

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Is it pre-lubed and ready to install?

Yes. This gearcase arrives fully assembled, pre-filled with gear lube, and ready for installation — no additional setup or modifications required.

4 Stroke 25″ Driveshaft – Fitment Chart

Fitment Chart: Compatible Yamaha Outboard Models

This lower unit fits a wide range of Yamaha 4-stroke outboards from 2010 to 2024 with 25-inch shaft length and a 1.75:1 gear ratio. Below is the full compatibility list:

Year	Model Number	Shaft	Gear Ratio
2024	F300XA2, F300XA, VF250XB	25″	1.75:1
2023	F225XB2, F225XB, F250XB2, F250XB, F300XA2, F300XA, VF250XB	25″	1.75:1
2022	F225XB2, F225XB, F250XB2, F250XB, F300XA2, F300XA, VF200XB, VF250XB	25″	1.75:1
2021	F225XCA, F225XB2, F225XB, F250XCA, F250XB2, F250XB, F300XCA, F300XA2, F300XA, VF200XA, VF200XB, VF250XA, VF250XB	25″	1.75:1
2020	F225XCA, F225XB, F250XB, F300XCA, F300XA, VF200XA, VF250XA	25″	1.75:1
2019	F225XCA, F225XB, F250XCA, F250XB, F300XCA, F300XA, VF200XA, VF250XA	25″	1.75:1
2018	F225XCA, F225XB, F250XCA, F250XB, F300XCA, F300XA, VF250XA	25″	1.75:1
2017	F225XCA, F225XB, F250XCA, F250XB, F300XCA, F300XA, VF250XA	25″	1.75:1
2016	F225XCA, F225XB, F250XCA, LF250XCA, F250XB, F300XCA, F300BETX, VF250XA	25″	1.75:1
2015	F225XCA, F250XCA, F300XCA, VF250XA	25″	1.75:1
2014	F225XCA, F250XCA, F300XCA	25″	1.75:1
2013	F225XCA, F250XCA, F300XCA	25″	1.75:1
2012	F225XCA, F250XCA, F300XCA	25″	1.75:1
2011	F225XCA, F250XCA, F300XCA	25″	1.75:1
2010	F250XCA, F250UCA, F250DET1X, F300XCA, F300BET1X	25″	1.75:1

Fitment Chart: Yamaha Outboards with 30″ Shaft (2014–2021)

This lower unit fits specific Yamaha 4-stroke outboards with a 30-inch driveshaft and 1.75:1 gear ratio, produced between 2014 and 2021.

Year	Model Number	Shaft	Gear Ratio
2021	F250UCA, F300UCA	30″	1.75:1
2020	F300UCA	30″	1.75:1
2019	F250UCA, F300UCA	30″	1.75:1
2018	F250UCA, F300UCA	30″	1.75:1
2017	F250UCA, F300UCA	30″	1.75:1
2016	F250UCA, F300UCA, F300BETU	30″	1.75:1
2015	F250UCA, F300UCA	30″	1.75:1
2014	F250UCA, F300UCA	30″	1.75:1