23427086 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 P6 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 P6 rear propeller for IPS 2 and IPS 20
• Nibral nickel-bronze-aluminium alloy, the Type P/PS series for IPS with D11 engines
• 18.9 kg
• Pairs with Type P6 front propeller 23427076; complete set is 3843968
• Listed for D11C2-A MP, D11C4-A MP and IPS20-E
• Supersedes 3843970
• Includes flow deflector to reduce shaft seal wear
• Type P6 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: P6
• Set contains: set 23427066, front 23427076

🔌 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 P6 designation has to match the front propeller for the engine to be loaded correctly.

⚠️ Common Signs of Failure

• Vibration increasing with shaft speed
• Loss of top speed or the engine unable to reach rated revolutions
• Blade edges nicked, curled or bent back
• Cavitation pitting or corrosion on the blade faces
• Fouling built up over the blades

🛠️ Service Notes

• This number is one propeller of a pair - order the Type P6 front 23427076 with it, or the complete P6 set 3843968, 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 23427066.
• Line cutter 21686494 is the one listed for Volvo Penta IPS 2, IPS 20.

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 23427086 → Supersedes 3843970

OEM / Related Numbers

• 3843970 earlier number superseded by this part

📦 Condition

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