852044 Castle Nut | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta castle nut from the Marine Propulsion group, weighing 0.034 kg and listed for 73 applications including MD, MB, AQ, D, BB and MS series engines. It is included in the folding propeller, and it supersedes part numbers 852492 and 850098, one of which was catalogued earlier as a washer.

🚤 Compatibility

• Engine Family: MD, MB, AQ, D, BB, MS, B, AQD

Full model list at the end of this description.

⚙️ Key Features

• Slotted castle pattern for a split pin
• Included in the folding propeller
• 0.034 kg
• Supersedes 852492 and 850098
• 73 applications across six engine series

🔌 Function

Clamps the joint and takes a split pin through its slots, so the nut cannot back off under vibration.

⚠️ Common Signs of Failure

• Nut found finger loose with the split pin sheared or missing
• Slots burred or spread where a pin has been hammered through
• Thread picked up or galled on removal
• Corrosion locking the nut solid to the shaft

🛠️ Service Notes

• Always fit a new split pin - the old one is not reusable once it has been opened out
• Because it also arrives inside the folding propeller, check what came in the box before ordering separately

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 852044 → Supersedes 852492

OEM / Related Numbers

• 850098 earlier number superseded by this part

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta 2003, 2003R, 2003R SOLAS, 110S, 120S, 120S-B, 2003TB, 2003TB SOLAS, 120SC, 2001AG, 2001B, 2001BG, 2001D, 2003D, 2003T, 2003TR, 2002AG, 2002B, 2002BG, 2002D, 2003B, 2003B SOLAS, 2003 SOLAS, 2001, 2002, 2001R
• Volvo Penta AQ130C, AQ130D, AQ130A, AQ130B
• Volvo Penta AQ170B, AQ170C, AQ170A
• Volvo Penta BB115A, BB115B, BB115C
• Volvo Penta BB170B, BB170C, BB170A
• Volvo Penta MB20A, MB20B, MB20C
• Volvo Penta MD5A, MD5B, MD5C
• Volvo Penta MS2B-A, MS2B, MS2V
• Volvo Penta AQ115A, AQ115B
• Volvo Penta AQD21A, AQD21B
• Volvo Penta MD11C, MD11D
• Volvo Penta MD17C, MD17D
• Volvo Penta MD21B, MD21A
• Volvo Penta MD6A, MD6B
• Volvo Penta MD7B, MD7A
• Volvo Penta AQ165A
• Volvo Penta AQD2B
• Volvo Penta B20
• Volvo Penta BB165A
• Volvo Penta D2002AG
• Volvo Penta D2003AG
• Volvo Penta MB10A
• Volvo Penta MD1B
• Volvo Penta MD2B
• Volvo Penta MD3B
• Volvo Penta MD67C