21433613 Propeller | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta four-blade nibral propeller for Volvo Penta IPS 3, IPS 30, the rear half of the type Q3 counter-rotating pair. It is machined from the specially developed nibral (nickel-bronze-aluminium) alloy Volvo Penta uses for its IPS propellers, which gives minimum growth, excellent durability and corrosion resistance. Volvo Penta IPS turns the propellers round to a forward-facing position, so the twin counter-rotating propellers pull the boat through the water rather than push it, and optimal interaction between the front and rear propeller holds performance and fuel efficiency across the whole speed range. The rear propeller carries the patented flow deflector, which controls the water flow and minimizes pressure and wear on the propeller shaft seals.

🚤 Compatibility

Typically suits:

• Volvo Penta D13C2-B MP
• Volvo Penta D13C2-A MP
• Volvo Penta D13C4-A MP
• Volvo Penta D13B-L MP
• Volvo Penta D13B-G MP
• Volvo Penta D13B-K MP
• Volvo Penta D13B-C MP
• Volvo Penta IPS30-E
• Volvo Penta D13C6-A MP
• Volvo Penta IPS3-C
• Volvo Penta D13C4-B MP
• Volvo Penta D13C5-B MP
• Volvo Penta D13C5-A MP
• Volvo Penta IPS30-D
• Volvo Penta IPS3-A
• Volvo Penta D13C7-B MP
• Volvo Penta D13C8-B MP

• Engine Family: D, IPS

⚙️ Key Features

• Type Q3 rear propeller, 4-blade right-hand Nibral
• Developed for IPS with D13 engines, IPS 3 and IPS 30 drives
• 51.71 kg
• Pairs with 21433603; complete Q3 set is 21433623
• The Q range runs QS4, QS5 and Q1 to Q8
• Extremely strong and specially developed nibral (nickel-bronze-aluminium) alloy.
• Minimum growth, excellent durability and corrosion resistance.
• Fully CNC machined and precisely balanced.
• Patented flow deflector minimizes pressure and wear on propeller shaft seals.
• The type Q/QS propeller is type approved by DNV for D13 IPS900, IPS1050, IPS1200 and IPS1350.
• Material: nibral
• Fits: Volvo Penta IPS 3, IPS 30 (D13 engines)
• Type: Q3
• Set contains: set 21433623, front 21433603

🔌 Function

Works as the rear half of the matched contra-rotating pair, converting drive torque into thrust and balancing the rotational flow through the IPS unit so the pair together reaches the engine speed the installation was propped for.

⚠️ Common Signs of Failure

• Vibration that builds with revs and was not there previously
• Loss of top speed with the engine at or above rated revs
• Chipped, curled or bent blade tips and edges
• Cavitation erosion pitting the blade backs
• Fishing line or rope found behind the hub, with the shaft seal weeping

🛠️ Service Notes

• Renew or repair as a matched pair with 21433603; the complete Q3 set is ordered as 21433623
• Order by the Q number rather than by weight: rear propellers 21433613 and 21433617 are different Q classes but publish the same 51.71 kg
• Line cutter 21686496 is the one listed for IPS 3 and IPS 30, and it mounts to the rear propeller on the existing locking bolts
• Fit front and rear to the same type code - complete set 21433623.

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21433603 - Matching Q3 front propeller
• 21433623 - Complete matched Type Q Q3 propeller set
• 21297787 - Propeller cone kit

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging