21433618 Propeller | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Type Q Q8 Rear IPS Nibral Propeller - Part Number: 21433618

Individual Type Q Q8 rear propeller for Volvo Penta IPS3 and IPS30 pod-drive installations with D13 marine engines. This 4-blade, right-hand-rotation Nibral propeller is designed to operate as the rear member of the matched contra-rotating Q8 pair. It must be used with matching front propeller 21433608 to preserve the engineered blade loading, thrust balance and cavitation performance.

⚙️ Key Features

• Genuine Volvo Penta Type Q Q8 rear IPS propeller

• 4-blade, right-hand-rotation Nibral construction

• Developed specifically for IPS propulsion with Volvo Penta D13 marine engines

• Matched to front propeller 21433608; complete Q8 set reference 21433628

• Individual propeller only; matching propeller, cone kit and mounting hardware are not included unless explicitly supplied

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21433618 - Current listed Volvo Penta Type Q Q8 rear propeller reference

OEM / Related Numbers:

• 21433608 - Matching Q8 front propeller

• 21433628 - Complete matched Type Q Q8 propeller set

• 21297787 - Propeller cone kit

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta IPS Type Q/QS contra-rotating Nibral propeller system

Typically suits:

• Engine / drive models:

• IPS3-A

• IPS3-C

• IPS30-D

• IPS3 / IPS30 drive installations specified for Type Q propellers

• HP Range: Not selected by horsepower alone; final Q-size is determined by IPS drive, D13 rating, vessel displacement, hull performance and Volvo Penta propeller-sizing data

• Engine Type: Volvo Penta D13 marine diesel with IPS3 or IPS30 pod drive

• Year Range: IPS3/IPS30 drive-generation and serial controlled

🔌 Function

Operates as the rear member of the matched contra-rotating propeller pair. Its blade area, pitch family and rotation are engineered to work with propeller 21433608, converting drive torque into efficient thrust while balancing rotational flow through the IPS propeller system.

Common signs of failure:

• Vibration, drumming or steering disturbance caused by bent or imbalanced blades

• Reduced acceleration, lower top speed or inability to reach the specified engine speed

• Cavitation burn, blade-edge erosion or impact damage

• Corrosion, cracking or material loss around the blades and hub

• Poor performance caused by mixing the Q8 propeller with a non-matching front size or damaged partner

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging