23427081 Propeller | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta four-blade nibral propeller for Volvo Penta IPS 2, IPS 20, the rear half of the type P1 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 D11C2-A MP
• Volvo Penta D11C4-A MP
• Volvo Penta IPS20-E

• Engine Family: D, IPS

⚙️ Key Features

• Type P1 rear propeller for IPS 2 and IPS 20
• Nibral nickel-bronze-aluminium alloy, the Type P/PS series for IPS with D11 engines
• 28 kg
• Pairs with Type P1 front propeller 23427071; complete set is 23427061
• Listed for D11C2-A MP, D11C4-A MP and IPS20-E
• Includes flow deflector to reduce shaft seal wear
• Type P1 rear propeller, four-blade.
• 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 P/PS propeller is type approved by DNV for D11 IPS650 and IPS800.
• Material: nibral
• Fits: Volvo Penta IPS 2, IPS 20 (D11 engines)
• Type: P1
• Set contains: set 23427061, front 23427071

🔌 Function

Runs behind the front propeller and turns the opposite way, recovering the swirl left in its wake as further thrust and cancelling the sideways pull a single propeller would produce. It is also the propeller the line cutter mounts to, and its P1 designation has to match the front propeller for the engine to be loaded correctly.

⚠️ Common Signs of Failure

• Vibration through the hull that builds with shaft speed
• Loss of top speed, or the engine unable to reach its rated maximum revolutions
• Blade edges chipped, bent or torn back after a strike
• Cavitation pitting or corrosion craters on the blade faces
• Marine growth over the blades

🛠️ Service Notes

• This number is one propeller of a pair - order the Type P1 front 23427071 with it, or the complete P1 set 23427061, because a mismatched pair will not let the engine reach its rated speed
• In every size in this run where a set and both its propellers carry a published weight, the two propeller weights do not add up to the set weight, so weight identifies nothing here - order by the designation
• Check the shaft seal and clear any line from behind the hub while the propeller is off, and confirm wide-open-throttle speed against the engine rating after any propeller change
• Fit front and rear to the same type code - complete set 23427061.
• Line cutter 21686494 is the one listed for Volvo Penta IPS 2, IPS 20.

📦 Condition

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