21487639 Engine Bracket | Genuine Volvo Penta Part

🔧 Product Description

A heavy-duty front or port-side engine mounting bracket used on Volvo Penta D4 and D6 marine propulsion engines.

🚤 Compatibility

• Engine Family: D
• HP Range: 145-480 HP

Full model list at the end of this description.

⚙️ Key Features

• Structural engine-mounting bracket
• Maintains engine and driveline alignment
• Replaces earlier bracket 3583516
• Designed for propulsion torque and vibration
• Used with dedicated cushion, nut and locking hardware

🔌 Function

The bracket transfers engine weight and torque reaction into the flexible mounting while maintaining propulsion alignment.

⚠️ Common Signs of Failure

• Fretting at mounting holes
• Engine movement
• Driveline misalignment
• Repeated mount or fastener failure

🛠️ Service Notes

• Start all the fasteners by hand and get the bracket sitting flat on clean mating faces before tightening anything, so nothing is pulled into strain
• Renew self-locking nuts, lock washers and thread-locking compound where the original assembly used them, and tighten to the figure given in the workshop manual for your engine
• Inspect the bracket for cracks around the holes and weld lines before fitting, and do not attempt to straighten or weld a distorted engine bracket back into service
• Where the bracket forms part of the engine mounting, recheck engine alignment and shaft or drive coupling alignment after the work, following the procedure for your installation
• Renew any flexible mount, bush or shim pack that is disturbed and found perished, corroded or crushed

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21487639 → Supersedes 3583516 → Supersedes 21152125

OEM / Related Numbers

• 3583516 earlier number superseded by this part
• 21152125 earlier number superseded by this part
• 23136596 - Related opposite-side bracket
• 21203504 - Related rubber cushions
• 3595043 - Related rubber cushions
• 847766 - Lock washer
• 990973 - Mounting nuts
• 955786 - Mounting nuts

📦 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, D4-150A-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G, D4-145I-G