CHRYSLER FC516054 Sailmaster Shaft Lower Unit 9.9

( Manufacturer Part Number: FC516054 ), ( Part Type: Hp Shaft Unit )

Review CHRYSLER Sailmaster Long Shaft Lower Unit 9.9 Hp Stroke Month Wty fits 1983–2012

The **Chrysler FC516054 SailMaster Shaft Lower Unit (9.9, 10, or 12 HP)** is a meticulously engineered marine propulsion component designed to deliver reliable performance and durability for mid-sized sailboats and powerboats from the early 1980s. This lower unit is a critical component of the SailMaster drive system, engineered to efficiently transfer power from the engine to the propeller while maintaining smooth operation and minimal wear. Crafted with precision, the FC516054 features a robust **9.9-inch, 10-inch, or 12-inch shaft diameter** compatibility, ensuring a secure and snug fit for a range of boat sizes and engine configurations. The lower unit is built with a **high-strength bronze or aluminum housing**, providing resistance to corrosion and ensuring longevity even in saltwater environments, where marine propulsion systems face the harshest conditions.

At the heart of this lower unit lies a **sealed and lubricated stern tube**, designed to prevent water ingress while allowing for smooth shaft rotation. The **grease-filled stern gland** ensures a tight seal, reducing friction and extending the life of the shaft and bearings. The FC516054 is equipped with a **high-quality, self-aligning bearing assembly**, which compensates for minor misalignments between the engine and propeller, reducing stress on the drivetrain and enhancing overall efficiency. The lower unit also features a **durable, corrosion-resistant propeller nut**, which secures the propeller shaft in place while allowing for easy removal and maintenance.

This lower unit is compatible with **Chrysler s SailMaster drive systems**, which were popular in the early 1980s for their balance of power and efficiency. Whether installed in a **sailboat auxiliary engine, a small powerboat, or a utility vessel**, the FC516054 delivers consistent performance across **9.9, 10, or 12 horsepower** applications, making it a versatile choice for both recreational and practical boating needs. The design emphasizes **ease of maintenance**, with accessible components that allow for straightforward inspections, lubrication, and repairs critical features for boat owners who prioritize reliability without sacrificing performance.

For those restoring or upgrading an older Chrysler-equipped vessel, the FC516054 is an excellent OEM replacement part, ensuring that the original functionality and durability of the SailMaster system are preserved. Its compatibility with **standard marine greases and lubricants** further simplifies maintenance routines, while its **compact yet sturdy construction** ensures it fits seamlessly into existing drivetrain setups. Whether used in a classic cruiser, a performance sailboat, or a versatile utility boat, this lower unit stands as a testament to Chrysler s engineering prowess of the era, offering a blend of strength, efficiency, and long-term reliability for modern boaters.

### **Pros and Cons of Buying a 1983 Chrysler FC516054 Sailmaster Shaft Lower Unit (9.9, 10, or 12 HP)**

1. **Reliability for Recreational Use** The Sailmaster series was designed for smaller, leisure boats (typically under 20 feet) and is known for being durable in calm to moderate conditions. If used in a controlled environment, it can last for years with proper maintenance.

2. **Affordability** These units are relatively inexpensive compared to modern outboards, making them a cost-effective option for budget-conscious buyers or those restoring older boats.

3. **Simplicity in Operation** The design is straightforward, with fewer electronic components than modern engines, which can make repairs easier for those with basic mechanical skills.

4. **Availability of Parts** Since these engines are older but still in use, replacement parts (such as gaskets, seals, and impellers) are often available through marine suppliers or salvage yards.

5. **Good for Trolling or Slow Cruising** The lower horsepower (9.9, 10, or 12 HP) makes it suitable for slow-speed applications like trolling, fishing, or small cruising, where high performance isn t required.

6. **Classic Boat Compatibility** If you own an older boat that originally came with this model, replacing it with a matching unit can preserve the boat s authenticity and resale value.

7. **Lower Fuel Consumption** Compared to modern high-horsepower outboards, these engines consume very little fuel, making them economical for occasional use.

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1. **Age and Wear** A 1983 unit will likely have significant wear, especially if it hasn t been properly maintained. Common issues include worn bearings, cracked impellers, or leaking seals.

2. **Lack of Modern Efficiency** These engines are not built for high performance or extended runtime. They may struggle in rough water, require frequent cooling checks, and lack the fuel efficiency of newer models.

3. **Limited Power for Demanding Tasks** The 9.9 12 HP range is insufficient for heavy loads, planing boats, or towing. If you need more power, you ll need a significantly larger (and more expensive) engine.

4. **Rust and Corrosion Risks** Older marine engines are prone to rust, especially if stored improperly. A thorough inspection is essential to avoid hidden damage.

5. **Difficulty Finding Specialized Help** While basic repairs may be manageable, locating a mechanic experienced with Chrysler Sailmaster units can be challenging compared to more common brands like Mercury or Yamaha.

6. **Environmental and Emissions Concerns** These engines do not meet modern emissions standards and may not be legal in some areas, particularly if used in protected waters.

7. **Potential for Hidden Problems** Without a service history, there s a risk of undetected issues like internal corrosion, worn pistons, or a failing starter motor.

8. **Limited Resale Value** If you decide to sell later, the market for these older units is niche, and you may not recover much of your investment.

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A 1983 Chrysler FC516054 Sailmaster lower unit can be a practical and affordable choice if you need a simple, low-power engine for a small boat used primarily in calm conditions. It s best suited for hobbyists, collectors, or those restoring classic boats where performance isn t the priority. However, if you require reliability for frequent or demanding use, a modern replacement or a higher-quality used outboard would be a safer investment.

- You have a specific need for this exact model (e.g., matching an original boat setup).

- You are prepared to inspect it thoroughly (or have a mechanic do so) for rust, leaks, and mechanical integrity.

- You plan to use it in controlled, low-stress conditions (e.g., a stationary dock, trolling, or a small fishing boat).

- You are willing to maintain it diligently, as older engines require more attention.

- You need reliable performance for planing, towing, or rough water.

- You cannot verify the engine s service history or condition.

- You are looking for long-term durability without significant upkeep.

- You want a legally compliant engine for areas with strict emissions regulations.

If possible, consider a **used but well-maintained outboard from the 1990s or early 2000s** (e.g., a Mercury 15 25 HP) for better reliability and efficiency. If you must use this unit, budget for potential repairs and be prepared for limited performance.

Details:

The item you are looking at is guaranteed to be described, pictured, and cross-referenced correctly. Driveshaft splines: 11. This does NOT cover seals.

Propeller shaft splines: 14. This unit is being sold with a 6 month working warranty that covers the gears, bearings, and shafts. This unit is shipped empty. This lower unit qualifies for a 6 month warranty.

Please add oil before use.

part #: fc516054 prices

• $200.00-$300.00

specifications ouboaen:

• for makes: Chrysler
• for years: 1983-2012
• mpn: Fc516054
• part type: Hp Shaft Unit

shipping ouboaen:

• class: Standard
• transit: 5-8 Days
• type: Fixed
• cost: $75.00
• service: Standard

general ouboaen:

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

seller ouboaen:

• rating: 99.9%
• city: Altamont, Illinois
• # reviews: 34095

returns ouboaen:

• policy: No Returns

offer ouboaen:

• started: February 13, 2026
• options: Ship-to-home
• availability: In Stock
• quantity: 1
• sold: 0

payments ouboaen:

• other
• wallet: Apple-pay
• credit card: Diners-club

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