21815875 Propeller Nut | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta propeller nut, front, part of the installation hardware for Volvo Penta IPS 15 (type N/NS propellers).

🚤 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

⚙️ Key Features

• Correct shaft thread
• Application-specific seating geometry
• Retains propeller under reversing load
• Designed for specified torque and locking method
• Drive and shaft version must match
• Propeller nut, front.
• Listed for Volvo Penta IPS 15 (type N/NS propellers).
• Fits: Volvo Penta IPS 15 (type N/NS propellers)

🔌 Function

Clamps the propeller and associated hardware securely on the propeller shaft.

⚠️ Common Signs of Failure

• Damaged or galled threads
• Rounded drive surfaces
• Nut will not retain specified torque
• Propeller movement on the shaft

🛠️ Service Notes

• Assemble the thrust washer, cone and any spacers in the order the manual gives onto a clean, undamaged thread — the propeller is clamped by the whole assembly, not held by the nut alone
• Tighten to the figure given in the workshop manual for your drive; a nut merely nipped up lets the propeller work on the shaft and ruins the hub and the taper
• Fit a new locking device where one is used — a lock or tab washer bent onto the flats, or a new split pin — and never reuse one that has already been bent
• Renew the nut if the thread is stretched, galled or corroded, or if the locking tabs or their seats are damaged; a corroded nut is also the reason a propeller will not come off next time
• Check the nut and its locking after the first run and at every haul-out — a slack propeller nut is a common cause of vibration and of lost propellers

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21808200 - flow deflector
• 21913550 - line cutter
• 963699 - spinner retaining screw
• 23284156 - locking fluid, 10 ml
• 21808191-21808197 / 21808211-21808217 - Type N1-N7 propeller components

📦 Condition

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