21433603 Propeller | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta three-blade nibral propeller for Volvo Penta IPS 3, IPS 30, the front 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.

🚤 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 front propeller, 3-blade left-hand Nibral
• Developed for IPS with D13 engines, IPS 3 and IPS 30 drives
• 53.524 kg
• Pairs with 21433613; complete Q3 set is 21433623
• The Q range runs QS4, QS5 and Q1 to Q8
• Includes flow deflector to reduce shaft seal wear
• Extremely strong and specially developed nibral (nickel-bronze-aluminium) alloy.
• Minimum growth, excellent durability and corrosion resistance.
• Fully CNC machined and precisely balanced.
• 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, rear 21433613

🔌 Function

Works as the front 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

• New vibration at cruising speed that builds with revs
• Boat down on top speed while the engine reaches or passes its rated revs
• Blade edges chipped, curled or bent after grounding or striking debris
• Rough, pitted cavitation damage on the blade backs
• Rope or fishing line found behind the hub, with the shaft seal weeping

🛠️ Service Notes

• Renew or repair as a matched pair with 21433613; 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

• 21433613 - Matching Q3 rear 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