MERCURY MAX5 Propeller Rh 678633107641 15.25 30.5 5-BLADE

( Part Type: Propeller ), ( Material: Stainless Steel ), ( Propeller Pitch: 30.5 ), ( Propeller Rotation: Standard ), ( Propeller Diameter: 15.25 ), ( Country Of Origin: United States ), ( California Prop 65 Warning: This Product May Contain Chemicals Known To The State Of California To Cause Cancer, Birth Defects, Or Other Reproductive Harm. ), ( UPC: 678633107641 )

Review MERCURY Propeller 15.25 30.5 Rh 5-blade Pre Owned fits ST

The **Mercury 678633107641 MAX5 Propeller (15.25" x 30.5" RH, 5-Blade)** is a high-performance, precision-engineered propeller designed exclusively for Mercury s MAX5 outboard motors, delivering unmatched efficiency, speed, and reliability for both recreational and competitive boating applications. Crafted from durable, lightweight marine-grade aluminum, this five-blade propeller is optimized for maximum thrust and fuel efficiency, making it an ideal choice for anglers, wakeboarders, and speed enthusiasts seeking superior handling and acceleration. The **15.25-inch diameter** and **30.5-inch pitch** combination ensures a balanced power-to-speed ratio, allowing the MAX5 to propel through the water with minimal drag while maintaining smooth, consistent performance across a wide range of throttle settings. The **right-hand rotation (RH)** design aligns seamlessly with Mercury s MAX5 outboard, ensuring optimal torque and directional control, whether you re trolling at low speeds or pushing the engine to its limits for high-speed runs.

What sets this propeller apart is its **advanced hydrodynamic blade shape**, featuring a refined, asymmetrical profile that reduces cavitation and improves water flow, resulting in less noise and greater durability over time. The **five-blade configuration** enhances thrust efficiency, particularly in rough water or when carrying heavy loads, while the **precision-machined surfaces** minimize corrosion and wear, extending the propeller s lifespan even in saltwater environments. Whether you re navigating choppy seas, launching a wakeboarder, or simply cruising with a full load of passengers, this propeller ensures a responsive, smooth ride with minimal vibration. For those who demand the best in performance, the **MAX5 propeller line** is engineered to work in tandem with Mercury s advanced fuel-injected engines, delivering a seamless power delivery system that maximizes horsepower while maintaining fuel economy. Whether you re a weekend angler or a competitive racer, this propeller is a game-changer, offering a perfect blend of speed, control, and reliability for the modern boater.

### **Pros and Cons of the Mercury 678633107641 Max5 Propeller (15.25" x 30.5" RH, 5-Blade)**

1. **High Performance for Max5 Engines** This propeller is specifically designed for Mercury s Max5 outboard motors, which are known for their power and efficiency. It is optimized to work well with the engine s powerband, providing better thrust and speed.

2. **5-Blade Design for Efficiency** The five-blade configuration helps reduce cavitation and improves water flow, leading to better fuel efficiency and smoother operation compared to older 4-blade propellers.

3. **Durability and Corrosion Resistance** Mercury propellers are typically made from high-quality stainless steel, which resists corrosion and wear, extending the propeller s lifespan, especially in saltwater applications.

4. **Balanced Thrust and Top Speed** The 15.25" diameter and 30.5" pitch are well-suited for mid-sized boats (typically 16 22 feet) that require a balance between acceleration and cruising speed. It is not overly aggressive for daily use but still delivers strong performance.

5. **Compatibility with Max5 Series** Since this propeller is designed for the Max5, it is likely to have better tuning and performance characteristics compared to generic propellers, reducing the risk of poor handling or inefficiency.

6. **Reduced Noise and Vibration** A well-designed 5-blade propeller helps dampen vibrations, leading to a quieter ride and less stress on the engine and boat structure.

7. **Versatility for Different Loads** The pitch (30.5") suggests it works well for boats with moderate to high displacement, making it suitable for fishing boats, cruisers, or utility boats that carry passengers or gear.

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1. **Potential for Over-Pitching on Light Loads** If the boat is very light (e.g., a small tender or a heavily loaded boat), the 30.5" pitch may cause the engine to struggle to reach optimal RPM, leading to poor acceleration or excessive strain on the engine.

2. **Cost Compared to Older Models** Mercury s newer propellers, especially those designed for high-performance engines like the Max5, can be more expensive than older 4-blade models. The price may not justify the upgrade if the boat s needs are not demanding enough.

3. **Risk of Damage from Foreign Objects** Like all propellers, this one is vulnerable to damage from debris (e.g., rocks, shells, or fishing line). The 5-blade design may make it slightly more susceptible to bending or chipping if struck improperly.

4. **Not Ideal for Extreme High-Speed Boats** While this propeller is good for mid-range performance, it may not be optimal for high-speed racing or extreme planing applications, where a more aggressive pitch or different blade design would be better.

5. **Maintenance Requirements** Stainless steel propellers still require regular cleaning (especially in saltwater) and occasional inspection for pitting or corrosion, which can add to maintenance costs over time.

6. **Potential for Cavitation at High Loads** If the boat is heavily loaded or the propeller is not perfectly balanced, cavitation can occur, leading to noise, vibration, and reduced efficiency. This may require tuning or a different propeller if the issue persists.

7. **Limited to Max5 Engines** If the boat is not equipped with a Max5 outboard, this propeller will not be as effective, and performance may suffer compared to a propeller specifically tuned for the engine s power output.

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The **Mercury 678633107641 Max5 Propeller (15.25" x 30.5" RH, 5-Blade)** is a well-engineered choice for boats powered by Mercury s Max5 outboards, particularly those in the 16 22-foot range. Its 5-blade design improves efficiency, reduces vibration, and offers better thrust than older models, making it ideal for daily use, fishing, or light cruising. However, it may not be the best fit for extremely light or heavily loaded boats, high-speed applications, or engines outside the Max5 series.

If your boat is already equipped with a Max5 engine and you experience issues with acceleration, fuel efficiency, or excessive noise, upgrading to this propeller could provide noticeable improvements. Conversely, if your boat s needs are simpler or your engine is not a Max5, a more basic or differently pitched propeller might be a better investment.

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- Your boat is powered by a Mercury Max5 outboard.

- You notice poor acceleration, high RPMs at cruising speed, or excessive vibration with your current propeller.

- Your boat is in the mid-sized range (16 22 feet) and requires a balance of speed and efficiency.

- You prioritize durability, reduced noise, and modern propeller technology.

- Your boat is very light or heavily loaded, and you suspect the pitch is too high.

- You frequently operate in extreme conditions (e.g., heavy fishing loads or high-speed planing).

- Your engine is not a Max5, and you want a propeller specifically tuned for your motor s power output.

- You are on a tight budget, as this propeller may be more expensive than necessary for your needs.

For the best results, consult with a Mercury dealer or marine mechanic to ensure the propeller matches your boat s weight, load, and intended use. If possible, test the propeller in different conditions before committing to it long-term.

Details:

No dings, scratches. $2000 shipped TD Max5 St 30.5P RH in good shape. Low run time. Too much prop for heavy tournament load my boat.

part #: 678633107641 prices

• $2800.00-$2890.00

specifications propboapar:

• for models: St
• for makes: Mercury
• part type: Propeller
• material: Stainless Steel
• propeller pitch: 30.5
• propeller rotation: Standard
• propeller diameter: 15.25
• country of origin: United States
• california prop 65 warning: This Product May Contain Chemicals Known To The State Of California To Cause Cancer, Birth Defects, Or Other Reproductive Harm.
• upc: 678633107641

returns propboapar:

• policy: No Returns

shipping propboapar:

• cost: $0.00
• service: UPS Ground
• type: Calculated
• carrier: UPS
• class: Standard
• transit: 4-10 Days

general propboapar:

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

payments propboapar:

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

offer propboapar:

• quantity: 1
• sold: 0
• options: Ship-to-home
• best offers: True
• started: March 13, 2026
• availability: In Stock

seller propboapar:

• # reviews: 365
• city: Olive Branch, Mississippi
• rating: 100.0%

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