YAMAHA 66M-45300-13-8D Lower Unit 9.9

( Manufacturer Part Number: 66M-45300-13-8D ), ( Part Type: Hp Unit ), ( Country Of Manufacture: Japan ), ( Donor Motor: Loose )

Review YAMAHA Lower Unit Inch 9.9 Hp Oem fits 2005–2020

Yamaha F20 9.9 HP Outboard Lower Unit (Model: 66M-45300-13-8D, Year: 2005)

The Yamaha 66M-45300-13-8D Lower Unit, designed for their F20 9.9 HP outboard motor, is a testament to Yamaha's commitment to quality and performance. This lower unit was manufactured in 2005 and offers a reliable and efficient propulsion system for your watercraft.

The 66M-45300-13-8D lower unit features a robust and durable design, with a gear ratio of 1.85:1, ensuring smooth and consistent power delivery. The unit is equipped with Yamaha's unique Multi-Venting System, which reduces cavitation and increases efficiency, especially in rough water conditions.

The lower unit is designed to fit perfectly with the F20 9.9 HP outboard motor, ensuring optimal performance and ease of installation. It comes with a 15" pitch propeller, providing a balance between speed and torque, making it suitable for a variety of water activities, from leisurely cruising to fishing.

The Yamaha 66M-45300-13-8D Lower Unit is known for its durability, thanks to its high-quality materials and precise manufacturing. It is built to withstand the rigors of continuous use in marine environments, ensuring long-lasting performance and minimal maintenance.

In summary, the Yamaha 66M-45300-13-8D Lower Unit is a reliable and efficient choice for those seeking a high-quality outboard lower unit. Its durability, performance, and versatility make it an excellent addition to any watercraft, offering a smooth, powerful, and enjoyable boating experience.

Analysis of Yamaha 66M-45300-13-8D 2005 Lower Unit (20-9.9 15 HP)

1. **Brand Reputation**: Yamaha is a well-known brand in the marine industry, with a reputation for quality, reliability, and durability.

2. **Power Output**: This lower unit offers a 15 HP engine, providing sufficient power for a variety of water activities.

3. **Year**: Being a 2005 model, it has been used for some time, which means it may be available at a lower price compared to newer models.

4. **Compatibility**: It is compatible with a wide range of Yamaha outboard motors, making it a versatile choice for boat owners.

1. **Age**: The 2005 model is relatively old, which means it may have undergone wear and tear over the years. This could lead to potential maintenance issues.

2. **Availability of Spare Parts**: Older models may have limited availability of spare parts, which could make repairs more difficult and costly.

3. **Warranty**: As it is a used product, there may be no remaining manufacturer's warranty, leaving the buyer responsible for any repairs.

4. **Performance**: While the power output is satisfactory, the performance of an older engine may not match that of a newer, more advanced model.

Conclusion: The Yamaha 66M-45300-13-8D 2005 Lower Unit (20-9.9 15 HP) offers a balance of affordability, power, and brand reputation. However, its age and potential maintenance issues should be carefully considered. If the buyer is comfortable with the possibility of occasional repairs and is looking for a cost-effective solution, this lower unit could be a good choice. On the other hand, if the buyer prefers a more recent model with a warranty and fewer potential maintenance issues, they may want to consider a newer lower unit. Ultimately, the decision should be based on the individual's specific needs, budget, and comfort level with maintenance.

Details:

The item you are looking at is guaranteed to be described, pictured, and cross-referenced correctly. Unit did not pressure check due to leaking from prop seal. Please add oil before use. Needs resealed.

Driveshaft splines show light wear. Shafts checked for straightness. Keg is broken.

This unit is shipped empty. Propeller shaft splines: 8. Driveshaft length from the top of water pump to shaft: 17-3/8. Driveshaft splines: 10.

Freshwater Condition. Part Number, 66M-45300-13-8D Supersedes -66M-45300-12-8D 66M-45300-11-8D 66M-45300-11-4D 66M-45300-10-4D 66M-45300-11-8D, Key, Points, 20 Inch Driveshaft.

part #: 66m45300138d prices

• $360.00-$450.00

specifications ouboaen:

• for makes: Yamaha
• for years: 2005-2020
• mpn: 66m-45300-13-8d
• part type: Hp Unit
• country of manufacture: Japan
• donor motor: Loose

payments ouboaen:

• other
• credit card: Discover
• wallet: Apple-pay

returns ouboaen:

• policy: No Returns

offer ouboaen:

• sold: 0
• started: August 7, 2025
• quantity: 1
• availability: In Stock
• options: Ship-to-home

general ouboaen:

• condition: Used
• Boat Parts > Outboard Engines Components > Other

shipping ouboaen:

• type: Fixed
• service: Standard
• cost: $0.00
• class: Standard
• transit: 3-7 Days

seller ouboaen:

• rating: 99.5%
• # reviews: 32353
• city: Altamont, Illinois

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