21808221 Propeller Kit | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta type N1 nibral propeller set for Volvo Penta IPS 15, specifically developed for IPS with D8 engines to give outstanding efficiency, onboard comfort and manoeuvrability. The set supplies the matched three-blade front propeller and four-blade rear propeller together. 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 IPS15-C
• Volvo Penta D8A2-A MP
• Volvo Penta D8A4-A MP
• Volvo Penta IPS15-B
• Volvo Penta IPS15-A
• Volvo Penta D8A8-A MP

• Engine Family: IPS, D
• HP Range: Approximately 600-700 HP
• Year Range: Approximately 2010s onward

⚙️ Key Features

• Matched Type N1 front and rear propeller set
• Three blade front propeller 21808191 with four blade rear propeller 21808211
• Nibral nickel bronze aluminium
• For Volvo Penta IPS 15 with D8 engines
• Type N and NS are DNV type approved for D8 IPS600, IPS650 and IPS700
• 52.617 kg
• Includes line cutter
• Includes flow deflector to reduce shaft seal wear
• Extremely strong and specially developed nibral (nickel-bronze-aluminium) alloy.
• Minimum growth, excellent durability and corrosion resistance.
• Patented flow deflector minimizes pressure and wear on propeller shaft seals.
• Three-blade front propeller and four-blade rear propeller.
• Fully CNC machined for exact tolerances and perfect geometry.
• Precise balancing for minimal vibration, quiet running and less wear on the drivetrain.
• The type N/NS propeller is type approved by DNV for D8 IPS600, IPS650 and IPS700.
• Supplied as a matched front and rear pair.
• Material: nibral
• Fits: Volvo Penta IPS 15 (D8 engines)
• Type: N1
• Set contains: front 21808191, rear 21808211

📋 Kit Contents

• Front / forward propeller - Volvo Penta 21808191
• Rear / aft propeller - Volvo Penta 21808211

🔌 Function

Supplies the complete counter-rotating pair for a forward facing pod: the front propeller carries the larger share of the load and the rear propeller recovers the swirl left in its wash and turns it back into thrust.

⚠️ Common Signs of Failure

• Vibration through the hull that follows engine speed
• Top speed down, or the engine sitting outside its normal rev band
• Blade tips bent, chipped or cracked after a grounding or a strike
• Blade faces pitted by cavitation erosion
• Marine growth and corrosion around the blades and hubs at haul-out

🛠️ Service Notes

• Fit both propellers from the set and keep them to the same Type code - the range runs NS4, NS5, N1, N2, N3, N4, N5, N6 and N7, and mixing codes front to rear changes how the load is shared
• The IPS 15 line cutter mounts to the rear propeller on the existing locking bolts, two per drive at 105 mm in 316 stainless steel, and adds no drag or fuel consumption
• With both propellers off, check the shaft splines and thrust faces, the drive's shaft seals for line damage, and the anodes before the new set goes on
• The type N/NS series runs NS4, NS5, N1, N2, N3, N4, N5, N6, N7 from moderate top speed to high top speed; N1 sits of 9 on that scale.
• Both propellers on a drive must carry the same type code - the front and rear are matched for torque distribution and mixing codes changes how the load is shared.
• Line cutter 21913550 is the one listed for Volvo Penta IPS 15.
• Volvo Penta water-resistant multi-purpose premium grease is recommended for propeller shafts and all other propeller components.

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 24167931 later replacement / superseding N1 set reference

OEM / Related Numbers

• 21815881 - propeller cone
• 963699 - cone retaining screw
• 21815875 - front propeller nut
• 21816205 - felt washer
• 21913550 - line cutter
• 21815872 - rear propeller nut
• 21808200 - flow deflector
• 963696 - flow-deflector screw
• 23284156 - locking fluid

📦 Condition

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