21433608 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 Q8 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 Q8 front propeller, 3-blade left-hand Nibral
• Developed for IPS with D13 engines, IPS 3 and IPS 30 drives
• Pairs with 21433618; complete Q8 set is 21433628
• The Q range runs QS4, QS5 and Q1 to Q8
• Includes line cutter
• 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: Q8
• Set contains: set 21433628, rear 21433618

🔌 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

• Vibration that comes in at a given speed and worsens with use
• Loss of top speed with the engine at or above its rated revs
• Blade tips and leading edges chipped, curled or bent
• Rough, pitted cavitation erosion on the blade backs
• Line found wound behind the hub, often together with a weeping shaft seal

🛠️ Service Notes

• Renew or repair as a matched pair with 21433618; the complete Q8 set is ordered as 21433628
• No weight is published for this propeller, so identify it by the Q number and by whether you need the front or the rear of the pair
• 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 21433628.

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21433618 - Matching Q8 rear propeller
• 21433628 - Complete matched Type Q Q8 propeller set
• 21297787 - Propeller cone kit

📦 Condition

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