21433601 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 Q1 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 Q1 front propeller for IPS 3 and IPS 30
• Nibral nickel-bronze-aluminium alloy, the Type Q/QS series for IPS with D13 engines
• 101 kg
• Pairs with Type Q1 rear propeller 21433611; complete set is 21433621
• 17 applications across the D13 MP engines and IPS3 / IPS30 drives
• Left-hand rotation
• Includes flow deflector to reduce shaft seal wear
• Type Q1 front propeller, three-blade.
• 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: Q1
• Set contains: set 21433621, rear 21433611

🔌 Function

Meets the water first, ahead of the drive, and turns engine torque into thrust as the leading half of the counter-rotating pair. The Q1 designation is what matches the propeller to the hull and lets the engine reach its rated wide-open-throttle speed.

⚠️ Common Signs of Failure

• Vibration through the hull that comes in at a particular speed and worsens over time
• Loss of top speed with the engine reaching or exceeding its normal maximum revs
• Chipped, curled or bent blade tips and leading edges after touching bottom or debris
• Pitted, roughened patches on the blade backs where cavitation has eroded the metal
• Fishing line or rope found wound behind the hub, with the shaft seal weeping

🛠️ Service Notes

• This number is one propeller of a pair - order the Type Q1 rear 21433611 with it, or the complete Q1 set 21433621, because a mismatched pair will not let the engine reach its rated speed
• The Q1 front 21433601 and rear 21433611 are published at 101 kg and 30.391 kg, 12.398 kg less than the 143.789 kg published for the set, so the figures do not reconcile - order by the Q1 designation, never by weight
• For commercial running in polluted or debris-laden water Volvo Penta also lists the QE series, which has thicker blades than the Q for extra strength at a slight cost in top speed, and is approved for D13 IPS900, IPS1050 and IPS1200
• Fit front and rear to the same type code - complete set 21433621.
• Line cutter 21686496 is the one listed for Volvo Penta IPS 3, IPS 30.

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21433611 - Matching Q1 rear propeller
• 21433621 - Complete matched Type Q Q1 propeller set
• 21297787 - Propeller cone kit

📦 Condition

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