21557786 Support | Genuine Volvo Penta Part

🔧 Product Description

A protecting-cover support used on 12-volt Volvo Penta D6 installations. It is the port-side support specified from engine serial number A154358 onward.

🚤 Compatibility

• Engine Family: D
• HP Range: 280-435 HP

Full model list at the end of this description.

⚙️ Key Features

• Port-side protecting-cover support
• 12-volt engine configuration
• Applicable from engine serial A154358 onward
• Supports engine cover 3818384
• Companion to 24V support 21552285

🔌 Function

The support secures the engine protecting cover and prevents vibration, rattling and contact with nearby engine components.

⚠️ Common Signs of Failure

• Cracked or bent support
• Cover vibration or rattling
• Cover misalignment or wiring chafe

🛠️ Service Notes

• Offer the support up and get both ends aligned with the fasteners finger-tight before tightening anything down — forcing a bracket into place leaves the component and the support permanently in strain
• Check the mating faces are clean and flat and that the support sits fully home without packing or shimming unless the workshop manual for your engine calls for it
• Inspect the old support, and the casting or panel it bolts to, for cracks around the bolt holes and elongated or worn holes; a support that has been working loose has usually damaged its seat as well
• Renew any locking fasteners and tighten to the figure given in the manual for your engine, then support the component so it is not left hanging on hoses, wiring or pipework
• Recheck the fasteners after the first period of running, and confirm the supported item still has clearance from moving parts and hot surfaces

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21557786 → Supersedes 3594997

OEM / Related Numbers

• 3594997 earlier number superseded by this part
• 3818384 - Engine cover
• 3841269 - Side supports
• 3841344 - Side supports
• 3588528 - Protecting cover
• 21552285 - 24V companion support

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D6-370A-C, D6-350A-A, D6-350A-B, D6-330A-D, D6-330D-E, D6-370D-E, D6-370D-B, D6-330D-B, D6-370D-A, D6-330D-C, D6-330A-C, D6-370D-C, D6-330D-D, D6-370D-D, D6-370A-D, D6-330A-E, D6-370A-E, D6-330I-D, D6-310I-B, D6-280I-B, D6-280I-C, D6-280I-D, D6-280I-E, D6-310I-D, D6-435I-D, D6-310I-E, D6-280I-A, D6-310I-A, D6-310D-B, D6-310D-D, D6-310D-C, D6-310D-E, D6-370I-A, D6-370I-B, D6-330I-B, D6-330I-C, D6-370I-C, D6-370I-D, D6-310A-B, D6-280A-C, D6-310A-C, D6-310A-A, D6-280A-D, D6-310A-D, D6-280A-E, D6-310A-E, D6-310I-C, D6-280A-A, D6-280A-B, D6-400A-E, D6-435D-A, D6-435D-D, D6-435D-E, D6-435I-A, D6-435I-C, D6-435I-E, D6-435D-C, D6-330I-E, D6-370I-E, D6-330A-B, D6-370A-B