963103 Lock Nut | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta lock nut weighing 0.016 kg and listed for 35 applications on D and V series units. Four more lock nuts appear alongside it, two of them marked with a thread size, so identify the thread of the nut being replaced before ordering.

🚤 Compatibility

• Engine Family: D, V
• HP Range: 175-480 HP

Full model list at the end of this description.

⚙️ Key Features

• 0.016 kg
• 35 listed applications
• Fits D and V series units
• One of five different lock nuts listed here

🔌 Function

Clamps a joint from the opposite face and resists loosening under vibration through its locking feature.

⚠️ Common Signs of Failure

• Nut spinning on freely, its locking feature spent
• Joint found loose despite the nut still being in place
• Nylon insert melted, missing or heat-glazed
• Thread stripped or galled on the stud
• Flats rounded by a slipping spanner

🛠️ Service Notes

• Lock nuts are single-use — a nut that runs down the thread by hand has lost its locking action and must be renewed
• Check the stud thread for damage before fitting the new nut

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 847755 referenced in the part notes

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D6-340I-G, D6-380I-G, D6-440I-G, D6-480I-G, D6-300A-G, D6-340A-G, D6-380A-G, D6-440I-WJ-G, D6-480I-WJ-G, D6-300D-G, D6-340D-G, D6-380D-G, D6-440D-G, D6-480D-G, D6-400A-G, D6-440A-G, D6-300I-G
• Volvo Penta D4-175I-G, D4-230I-G, D4-270I-G, D4-320I-G, D4-300I-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G
• Volvo Penta V6-200-CE-P, V6-250-CE-P, V6-280-CE-P, V6-250-CE-R, V6-280-CE-R
• Volvo Penta V8-300-CE-P, V8-350-CE-P, V8-380-CE-P, V8-430-CE-P