Solas Amita 3 Stainless Rear Right Propeller 13 1/4x17 for Volvo Penta DuoProp

This Solas Amita 3 stainless rear propeller 13 1/4x17 is specifically designed to work in tandem with a 15x17 front prop as a duo-prop set for Volvo Penta. As the rear prop with right-hand rotation, its role is to “follow” and complement the left-rotating front prop – together they generate strong straight-line thrust and cancel out transverse forces. Made from high-grade stainless steel, this rear prop can withstand substantial stresses (such as sudden acceleration or high-speed running) without blade distortion, ensuring consistent performance and a longer lifespan.

The 17″ pitch of the rear prop corresponds to the 17″ pitch of the front – it’s crucial that both props in a duoprop system are matched in size/pitch. In the C4 set (17″ pitch), the focus is on powerful acceleration and good maneuverability. Your boat will plane quickly, even when loaded with crew and gear. The top speed will be slightly lower than with a C5 set (19″ pitch), but you gain easier handling and less strain on the engine during takeoff.

Benefits of the duo-prop system with this rear prop:

• Handling: The twin counter-rotating props eliminate steering torque – the boat won’t pull to one side during acceleration, which is a common issue with single-prop setups. This means straighter tracking and safer, more predictable handling.
• Water Grip: The rear prop bites into the disturbed water flow from the front prop and extracts additional thrust. The effect is continuous propulsion, akin to having twin engines. This is especially valuable on heavy vessels (e.g. 7-8+ meter boats) where a single prop might ventilate.
• Efficiency: With a properly sized set (as this 15x17 + 13.25x17 combination is), the engine operates at its optimal RPM. Solas props may impart slightly different load than OEM Volvo Penta, but they are engineered to deliver similar or improved performance characteristics.

Installation & Compatibility: The Solas Amita 3 part number 8531-133-17 is a direct replacement for the original Volvo Penta rear prop in the DP290 Duoprop system (C4 series). It fits onto the drive gear via a 19-spline hub. It’s recommended to use the matching Solas front and rear propellers together to ensure proper pairing and balance. The prop comes factory-balanced, but when installing, follow Volvo Penta’s guidelines – typically the rear prop is mounted after the front prop is in place, and secured with the cone and locking tab/bolt.

Pro Tip: Always align the rear prop blades between the front prop blades (Volvo Penta recommends offsetting by about half a blade span) when installing, to minimize vibration. Regularly inspect both props for damage or fishing line, and ensure the locking hardware is secure before each outing. With the Solas Amita 3 duo-prop set, you’ll experience improved thrust, quicker planing, and a smooth ride, making your Volvo Penta-powered boat more responsive and efficient.