984825 Flange Screw | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta flange screw for the Dual Damper, weighing 0.145 kg and listed for 49 applications across the D, TAD and TWD engine families. It replaces two earlier numbers, 978447 and 993179.

🚤 Compatibility

• Engine Family: D, TAD, TWD
• HP Range: 180-300 HP

Full model list at the end of this description.

⚙️ Key Features

• For the Dual Damper
• 0.145 kg
• 49 applications across the D, TAD and TWD families
• Replaces both 978447 and 993179
• Quantity varies by assembly, most commonly 12

🔌 Function

Clamps the damper to the crankshaft flange, the integral flange under the head spreading the clamping load across the joint face.

⚠️ Common Signs of Failure

• Vibration or a rumble from the front of the engine that changes with speed
• Screws found slack, with bright fretting marks under the heads
• Bruised or elongated holes in the damper flange
• Thread stretched, so it binds part way down
• Head corroded or the drive rounded

🛠️ Service Notes

• Damper screws are among the most highly stressed fasteners on the engine. Renew the complete set rather than a single screw, and tighten to the figure in the engine's manual
• Inspect the damper itself while the screws are out, as loose screws are usually a symptom rather than the cause

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 984825 → Supersedes 978447

OEM / Related Numbers

• 993179 earlier number superseded by this part
• 978447 earlier number superseded by this part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 D13C3-B MH, D13C4-B MH, D13C5-B MP, D13C4-B MP, D13C3-B MG, D13C4-B MG, D13C2-A MG, D13C1-A MG, D13C7-B MP, D13C8-B MP, D13B-N MH, D13C1-A MH
• Volvo Penta D4-260A-F, D4-260D-F, D4-260I-F, D4-300A-F, D4-300D-F, D4-180I-F, D4-225I-F, D4-300I-F, D4-225A-F, D4-230I-G
• Volvo Penta D16C1-E MG, D16C1-F MG, D16C2-E MG, D16C2-F MG, D16C1-E MH, D16C1-F MH, D16C2-E MH, D16C2-F MH
• Volvo Penta TAD1640-42GE-B, TAD1640VE-B, TAD1640-42VE-C
• Volvo Penta D8A6-A MH, D8A6-A MG
• Volvo Penta TAD1641VE-B, TAD1641VE
• Volvo Penta TAD1642VE-B, TAD1642VE
• Volvo Penta TAD1643VE-B, TAD1643VE
• Volvo Penta TWD1683GE-B, TWD1683VE
• Volvo Penta TAD1650VE-B/51VE
• Volvo Penta TAD1670-72VE
• Volvo Penta TWD1644-45GE
• Volvo Penta TWD1672-1673GE
• Volvo Penta TWD1682-83GE
• Volvo Penta TWD1744GE