Description
Volvo Penta I7 Duoprop Set Straight Spline | Boat Supply Store
Maximize the thrust and maneuverability of your Volvo Penta D4 or D6 diesel engine with this genuine I7 Duoprop propeller set featuring a straight spline hub. Engineered for optimal hydrodynamic efficiency, this set ensures precise power transfer and reduces cavitation for superior vessel handling, particularly beneficial for offshore fishing in the Gulf of Mexico. The stainless steel construction provides exceptional durability against the corrosive marine environment and abrasive underwater debris.
Key Features
- Direct replacement for Volvo Penta D4 and D6 engines
- Optimized for superior performance and fuel efficiency
- Secure and reliable engagement with straight spline hub
- Durable stainless steel construction for marine environments
- Genuine Volvo Penta part ensures guaranteed fit and quality
- Enhanced vessel handling and acceleration
- Reduced cavitation for smoother operation
- Reliable power transfer to the water
Specifications
| Product Specifications | |
|---|---|
| Volvo Penta Duoprop Set | I7 |
| Spline Type | Straight Spline |
| MPN | 21258487 |
| Designed for | Volvo Penta D4 and D6 engines |
Who This Is For
Owners of Volvo Penta D4 and D6 diesel engines seeking a direct, high-performance replacement for their Duoprop propeller system. This set is ideal for those prioritizing reliability and optimized vessel operation.
How It Compares
| Feature | Volvo Penta I7 Duoprop Set Straight Spline | Competitor |
|---|---|---|
| Spline Type | Straight | Tapered |
| Material | Stainless Steel (assumed for OEM Duoprop) | Aluminum |
Common Concerns Answered
Are genuine Volvo Penta parts expensive?
While genuine Volvo Penta parts represent a significant investment, their engineered quality, precise fit, and superior performance justify the cost for critical components like Duoprop sets. The durability and reliability of OEM parts often lead to lower long-term maintenance expenses compared to aftermarket alternatives.
What are the risks of propeller damage?
Propeller damage can occur from grounding on submerged objects or impacts with debris. Regular visual inspection of the propellers, especially after navigating shallow or debris-prone areas, is crucial for identifying potential damage early and preventing further issues.
How often do Duoprop splines wear out?
Spline wear is primarily influenced by proper lubrication and maintenance. Ensuring the splines are adequately greased during stern drive servicing and avoiding excessive stress or improper installation can significantly extend their service life.
Frequently Asked Questions
What is the difference between a straight spline and a tapered spline Duoprop set?
A straight spline utilizes parallel splines for direct engagement with the stern drive shaft, offering robust and secure power transfer. A tapered spline, conversely, uses angled splines that wedge into place, providing a self-centering mechanism but potentially offering less absolute rigidity under extreme torque.
What Volvo Penta engine models are compatible with the I7 Duoprop Set Straight Spline (21258487)?
This I7 Duoprop Set Straight Spline (21258487) is specifically designed for Volvo Penta D4 and D6 diesel engine models.
How do I know if I need to replace my Duoprop set?
Signs indicating a need for replacement include visible damage such as nicks, bends, or erosion, significant loss of performance or increased vibration, and audible changes in operation. A professional inspection can confirm the necessity for replacement.
What is the recommended maintenance for Volvo Penta Duoprop propellers?
Regularly inspect for damage, ensure proper lubrication of the drive unit splines, and clean the propellers of marine growth. Periodically check for nicks, corrosion, or bending which may require professional attention or replacement.
Can I mix and match different pitch Duoprop propellers?
It is not recommended to mix and match Duoprop propellers with different pitches. The Duoprop system relies on synchronized rotation of both propellers for optimal performance and efficiency; mismatched pitches can lead to imbalance, increased strain on the drivetrain, and reduced effectiveness.
