VOLVO 854781 Duo Prop Front 329

( Manufacturer Part Number: 854781 ), ( Part Type: Prop )

Review VOLVO Duo Prop Front #329 fits A-8

The **Volvo 854781 Duo Prop A-8 Front 329** is a high-performance, precision-engineered propeller blade designed for aircraft with a focus on efficiency, durability, and optimal aerodynamic performance. This propeller is part of Volvo Aero s advanced **Duo Prop** series, a cutting-edge technology that combines the benefits of a constant-speed propeller with the reliability and simplicity of a fixed-pitch design, all while delivering exceptional fuel efficiency and reduced noise levels. The **A-8** designation indicates a specific blade design optimized for high-performance applications, particularly in turboprop aircraft where power and thrust are critical. The **Front 329** designation refers to the propeller s front hub assembly, which is engineered to integrate seamlessly with modern turboprop engines, ensuring smooth operation and minimal vibration. Constructed from high-grade aluminum alloys, this propeller blade features a **two-blade configuration**, which enhances thrust efficiency while maintaining a compact footprint, making it ideal for smaller to mid-sized aircraft. The **Duo Prop** technology incorporates a unique **variable-pitch mechanism** that adjusts the blade angle in real-time, automatically optimizing performance across a wide range of flight conditions from takeoff and climb to cruise and descent. This adaptive capability not only improves fuel economy by reducing drag but also enhances engine efficiency, extending the lifespan of the powerplant. The **A-8 blade design** itself is aerodynamically refined, with a carefully contoured airfoil that minimizes turbulence and maximizes lift, ensuring consistent performance even at high speeds. The **329 front hub** is equipped with advanced bearings and sealing systems to withstand the rigors of continuous operation, including exposure to moisture, temperature fluctuations, and high centrifugal forces. This hub also incorporates a **hydraulic or electric pitch control system**, depending on the aircraft s configuration, allowing for precise adjustments without the complexity of traditional constant-speed propellers. Whether installed on a regional airliner, a cargo aircraft, or a specialized turboprop, the **Volvo 854781 Duo Prop A-8 Front 329** delivers a perfect balance of power, efficiency, and reliability, making it a preferred choice for operators seeking both performance and long-term operational cost savings. Its robust construction and innovative design ensure it remains a dependable component in modern aviation, contributing to smoother flights, reduced maintenance requirements, and enhanced overall aircraft performance.

### **Pros and Cons of Buying a Volvo 854781 Duo Prop A-8 Front 329**

#### **Pros**

1. **Reliability and Durability**

Volvo s marine engines, particularly the A-8 series, are known for their robust construction and long-term reliability. The A-8 is a well-proven diesel engine designed for heavy-duty use, making it suitable for commercial and recreational boats alike. Properly maintained, these engines can last decades with minimal major issues.

2. **Power and Performance**

The A-8 engine, particularly in its 329 cubic inch (5.4L) configuration, delivers strong torque and power, making it ideal for larger boats, fishing vessels, or workboats. The duo-prop setup (two propellers) enhances maneuverability and thrust, which is beneficial for boats requiring precise control, such as fishing boats or tugs.

3. **Fuel Efficiency**

Diesel engines like the A-8 are generally more fuel-efficient than gasoline engines, especially when used for extended periods. This can result in lower operating costs over time, particularly for commercial applications where the engine runs frequently.

4. **Resale Value**

Volvo Penta engines, including the A-8 series, retain a relatively strong resale value compared to some other marine engine brands. This is partly due to their reputation for durability and the availability of parts and service support.

5. **Compatibility and Aftermarket Support**

The A-8 engine is widely used in the marine industry, so finding replacement parts, service manuals, and technicians familiar with this model is relatively straightforward. Volvo Penta also offers extensive documentation and support for older models.

6. **Low Operating Costs (When Maintained Properly)**

Diesel engines tend to have lower maintenance costs per hour of operation compared to gasoline engines, especially if routine maintenance (oil changes, filter replacements, etc.) is consistently performed. The A-8 s simplicity also reduces the likelihood of complex or costly repairs.

7. **Versatility**

The A-8 engine can be adapted to various applications, from fishing boats to small commercial vessels. The duo-prop setup is particularly useful for boats that require strong pulling power or precise steering, such as those used in fishing or towing.

---

#### **Cons**

1. **Age and Wear**

The Volvo 854781 model appears to be an older A-8 engine, likely from the late 1980s or early 1990s. Engines of this age may show signs of wear, such as:

- **Worn bearings, pistons, or crankshafts** (common in high-hour engines).

- **Exhaust manifold or turbocharger issues** (if the engine was not regularly serviced).

- **Fuel system problems** (older diesel fuel can degrade seals and injectors over time).

A thorough pre-purchase inspection (including a compression test, leak-down test, and inspection of internal components) is critical to assess the engine s condition.

2. **Maintenance Requirements**

- **Fuel system clogging** (due to older fuel or lack of fuel filtration).

- **Coolant system corrosion** (if the engine was not flushed regularly).

- **Timing belt or chain wear** (if not replaced at recommended intervals).

Buyers must be prepared for potential maintenance costs, especially if the engine has high hours (e.g., over 2,000 hours without major overhauls).

3. **Emissions and Compliance**

Older diesel engines may not meet modern emissions standards, particularly if the boat is used in regulated waters (e.g., coastal or commercial zones). Retrofitting or modifying the engine to comply with newer emissions rules (e.g., Tier 3) can be costly.

4. **Parts Availability and Cost**

While parts for the A-8 are still available, some components (especially OEM parts) may be more expensive than for newer engines. Rebuilding kits or used parts may also require sourcing from specialty suppliers, increasing costs.

5. **Fuel Quality and Compatibility**

Older diesel engines are sensitive to fuel quality. Modern diesel fuel contains additives that can degrade seals in older engines. Using **marine diesel with proper stabilizers** and ensuring the fuel system is clean is essential to avoid issues like injector clogging or fuel filter failures.

6. **Potential for Hidden Damage**

- **Cracked cylinder heads or blocks** (from overheating or age).

- **Worn rod bearings or main bearings** (leading to metal shavings in the oil).

- **Turbocharger failure** (a common issue in older turbocharged diesels).

may not be immediately apparent. A **compression test, oil analysis, and internal inspection** are strongly recommended.

7. **Resale Limitations**

While Volvo Penta engines hold value, an older A-8 with high hours may not appeal to buyers looking for modern, low-maintenance engines. If you plan to sell the boat later, the engine s age and condition could limit resale potential.

8. **Noise and Vibration**

Older diesel engines, especially turbocharged ones, can be louder and vibrate more than modern counterparts. This may not be an issue for commercial use but could be a drawback for recreational owners seeking a quieter ride.

---

### **Conclusion**

The **Volvo 854781 Duo Prop A-8 Front 329** is a **powerful, reliable workhorse** when properly maintained. It excels in applications requiring **torque, durability, and maneuverability**, such as fishing boats, tugs, or commercial vessels. However, its **age introduces risks** primarily **wear and tear, maintenance demands, and potential hidden mechanical issues** that must be carefully evaluated before purchase.

If you are **prepared for thorough inspection, regular maintenance, and potential repairs**, this engine can be an excellent long-term investment. Conversely, if you are looking for a **low-maintenance, modern engine**, a newer diesel (e.g., Volvo D6, C6, or Yamaha F100) may be a better choice.

---

### **Recommendation**

1. **Get a Professional Inspection**

- **Compression test** (to check cylinder condition).

- **Leak-down test** (to identify internal wear).

- **Oil analysis** (to detect metal particles or contamination).

- **Visual inspection of turbocharger, injectors, and fuel system**.

- Request **service records** to verify maintenance history (oil changes, belt replacements, etc.).

2. **Budget for Potential Repairs**

- **Rebuild or overhaul** (if internal components are worn).

- **Turbocharger replacement** (a common failure point).

- **Fuel system cleaning or injector replacement**.

- Expect to spend **$3,000 $8,000 ** depending on the extent of work needed.

3. **Consider a Rebuild or Replacement**

- If the engine is **beyond 2,000 hours with no major overhauls**, weigh the cost of a **full rebuild** ( $5,000 $10,000) against purchasing a **used but lower-hour A-8 or a newer diesel engine**.

- If the boat is **high-value**, replacing the engine with a **modern Volvo D6 or C6** (if compatible) may be more cost-effective long-term.

4. **Use the Engine for the Right Application**

- The A-8 is **best suited for commercial or heavy-duty use** where reliability and power are prioritized over fuel efficiency or emissions compliance.

- Avoid using it in **high-emission zones** without retrofitting (e.g., adding a **DPF or SCR system**).

5. **Negotiate Based on Condition**

- If the inspection reveals **minor issues**, use them to **negotiate a lower price**.

- If major repairs are needed, **factor those costs into the purchase price** or walk away if the total cost exceeds the boat s value.

6. **Alternative Options**

- A **lower-hour A-8** (under 1,500 hours) with full service records.

- A **newer Volvo D6 or C6** (more fuel-efficient, lower emissions, easier maintenance).

- A **Yamaha F100 or F110** (reliable, modern, and widely available).

---

### **Final Verdict**

- You have **verified it s in good condition** through a professional inspection.

- You re **prepared for maintenance and potential repairs**.

- You need **a powerful, durable engine** for commercial or heavy-duty use.

- The **total cost of ownership** (purchase repairs fuel) aligns with your budget.

- The engine has **high hours without recent overhauls**.

- You **cannot afford unexpected repairs**.

- You prefer **modern, low-maintenance engines** for recreational use.

- The **boat s value is significantly reduced

Details:

With the manufacturer part number 854781, this propeller is a high-quality replacement for your boats engine. It is essential for maintaining the optimal performance and efficiency of your boats propulsion system. The Volvo Duo Prop A-8 Front #329 is a specific model made by designed for boats.

part #: 854781 prices

• $125.00-$294.87

specifications propboapar:

• for models: A-8
• for makes: Volvo
• mpn: 854781
• part type: Prop

general propboapar:

• Parts Accessories > Boat Parts > Propellers
• condition: Remanufactured

returns propboapar:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

payments propboapar:

• credit card: Discover
• wallet: Paypal
• other

seller propboapar:

• city: Mukilteo, Washington
• # reviews: 55
• rating: 100.0%

offer propboapar:

• sold: 0
• quantity: 1
• started: May 15, 2026
• options: Ship-to-home
• availability: In Stock

shipping propboapar:

• cost: $0.00
• service: USPS Ground Advantage
• type: Calculated
• carrier: USPS
• class: Standard
• transit: 7-12 Days

Volvo 854781 Is Similar To:

• 854984-2 Volvo Penta High Speed Prop Lh Part (39.5% similar) ...(October 9th, 2018)
• 0763306 Evinrude Johnson New Oem Omc Part Prop Rh Ss Volvo (25.5% similar) Pen the package and inspect item for damage. Do not throw away the packaging, put package back together, it may need to be made available for inspection by carrier. They will not note the damage unless you point it out. If the item is damaged immediately for further instruction on filing a claim. ...(October 17th, 2018)
• 082031 Michigan Wheel Lh Volvo Prop (28.2% similar) ...(October 4th, 2018)
• 082055 092055-1 813296-1 Smc 592 Volvo Penta Used Prop Lh (28% similar) Make: volvo endometrial: aluminum rotation: counter left hand diameter: 15PITCH: 11PART number: 082055, MC 592EXHAUST ports: no splines - 17...(October 18th, 2018)
• 082090-1 Volvo Penta Rh Aq Series Prop Long Hub (38.6% similar) Feel free to with any questions on this offer. This offer is for a volvo pent aluminum prop number right hand rotation...(March 9th, 2018)
• 14.25x21 Volvo Penta Sx Prop Propeller Pitch Rh No Damage (34.4% similar) You are buying on a very nice condo used prop with no damage volvo pent SC propeller x 21 pitch Rh 14. 25 x 21 no damage...(January 1st, 2019)
• 14.2x23 Volvo Penta Motor Boat Propeller Prop (39.5% similar) Nice used prop...(January 25th, 2019)
• 21324312 Volvo Penta I2 Duo (31.7% similar) Manufacturer - volvo pent marine size i2 rear part number shaft rear 19 tooth rotation right hand material aluminum of blades 4 condition new in box application duo prop DPs drive the development work and experience from successful DH UPS duo-propellers have been possible to transfer a aluminium ...(June 25th, 2017)
• 22417007 Volvo Penta Prop Set Stainless (37.3% similar) This sale is for a new volvo pent, k4 prop kit forward drive consisting of two propellers rear right hand 40 spline and front left 3 blade 23...(December 18th, 2018)
• 22417008 Volvo Penta Boat Duo Propeller Lh Rh Set Of Demo (38.7% similar) Hardware and instruction installation manual not included. May contain minor scuffs scratches and signs of installation, performance is not affected. Buying more than one item. Great lakes skipper is happy to combine multiple items into order. The high-strength stainless steel adds excellent ...(July 20th, 2018)
• 22898343 Volvo Penta Nibral Prop Set For Dph Drive (34.9% similar) These sets retail for over up offer is one volvo pent g3 proposed. We have other sizes available so please feel free to with any questions. This set includes both the front and rear prop. These are Liberal props for the DH drive part so take advantage of our low reserve...(January 15th, 2019)