23427071 Propeller | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta three-blade nibral propeller for Volvo Penta IPS 2, IPS 20, the front 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.

🚤 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 front propeller for IPS 2 and IPS 20
• Nibral nickel-bronze-aluminium alloy, the Type P/PS series for IPS with D11 engines
• Pairs with Type P1 rear propeller 23427081; complete set is 23427061
• Listed for D11C2-A MP, D11C4-A MP and IPS20-E
• Supersedes 3843981
• 3-blade
• Includes flow deflector to reduce shaft seal wear
• Type P1 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 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, rear 23427081

🔌 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 P1 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 builds with shaft speed
• Loss of top speed or the engine not reaching its rated maximum revolutions
• Leading edges nicked, torn or bent back after a strike
• Cavitation pitting or corroded craters on the blade backs
• Growth and fouling covering the blade surfaces

🛠️ Service Notes

• This number is one propeller of a pair - order the Type P1 rear 23427081 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
• Genuine Volvo Penta propellers carry a 12 month warranty, extended to 24 months including labour when supplied and fitted by an authorised Volvo Penta dealer
• 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.

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 23427071 → Supersedes 3843981

OEM / Related Numbers

• 3843981 earlier number superseded by this part

📦 Condition

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