21612639 Alternator | Genuine Volvo Penta Part

🔧 Product Description

A marine-rated 12-volt, 75-amp alternator equipped with an approximately 63mm multi-groove serpentine pulley for Volvo Penta petrol engine charging systems.

🚤 Compatibility

• Engine Family: V
• HP Range: 200-430 HP

Full model list at the end of this description.

⚙️ Key Features

• Electrical output: 12V, 75A
• Approximate pulley diameter: 63mm
• Multi-groove serpentine pulley
• Marine ignition-protected construction
• Replaces earlier Volvo Penta alternator 3862613

🔌 Function

The alternator converts engine rotation into regulated electrical power for battery charging and vessel electrical loads.

⚠️ Common Signs of Failure

• Battery warning light or alarm
• Low or excessive charging voltage
• Intermittent output
• Bearing noise or pulley wobble
• Burnt wiring or overheated terminals
• Repeated belt wear caused by pulley misalignment

🛠️ Service Notes

• Isolate the batteries before you start, and never disconnect the alternator or battery cables with the engine running — that will destroy the diodes
• Reconnect exactly as it came off, correct polarity, terminals clean and tight, and check the earth path through the mountings and engine is sound
• Check the pulleys line up and the belt runs true; renew a glazed, cracked or oil-contaminated belt at the same time and tension it by the procedure in the manual for your engine
• Support the alternator while you fit and tighten the mounting and adjusting bolts to the manual's figures, and never lever against the alternator body or end covers
• After fitting, confirm the charge warning goes out and charging voltage is correct, and recheck belt tension after the first running period

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21612639 → Supersedes 3862613

OEM / Related Numbers

• 3862613 - Earlier Volvo Penta alternator
• 8M6007509 - Mercury / Quicksilver reference
• 18-6847 - Sierra reference
• ARCO 60076

Aftermarket / Verified Equivalents

• Sierra 18-6847
• ARCO: 60076

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta V8-300-C-M, V8-300-CE-M, V8-350-C-M, V8-350-CE-M, V8-300-C-N, V8-300-CE-N, V8-350-C-N, V8-350-CE-N, V8-380-C-M, V8-380-CE-M, V8-380-CE-A, V8-380-C-B, V8-380-CE-B, V8-380-C-D, V8-380-CE-D, V8-430-CE-D, V8-350-C-D, V8-350-CE-D, V8-380-C-A, V8-380-CE-J, V8-380-C-J, V8-430-CE-J, V8-430-C-J, V8-350-C-H, V8-350-CE-H, V8-350-C-J, V8-350-CE-J, V8-430-C-M, V8-430-CE-M, V8-300-C-K, V8-300-CE-K, V8-350-C-K, V8-350-CE-K, V8-380-C-K, V8-380-CE-K, V8-430-C-K, V8-430-CE-K, V8-300-CE-G, V8-300-C-G, V8-300-C-H, V8-300-CE-H, V8-300-C-J, V8-300-CE-J, V8-350-C-G, V8-350-CE-G, V8-380-C-N, V8-380-CE-N, V8-430-C-N, V8-430-CE-N
• Volvo Penta V6-200-N, V6-200-C-N, V6-200-CE-N, V6-240-M, V6-240-C-M, V6-240-CE-M, V6-280-M, V6-280-C-M, V6-280-CE-M, V6-280-J, V6-280-CE-J, V6-280-G, V6-280-C-G, V6-280-CE-G, V6-280-C-J, V6-240-N, V6-240-C-N, V6-240-CE-N, V6-280-N, V6-280-C-N, V6-240-CE-K, V6-280-CE-K, V6-200-C-G, V6-200-G, V6-200-J, V6-200-C-J, V6-280-CE-N, V6-200-M, V6-200-C-M, V6-250-O, V6-250-C-O, V6-250-CE-O, V6-240-C-G, V6-240-CE-G, V6-240-G, V6-240-J, V6-240-CE-J, V6-240-C-J
• Volvo Penta 3.0GLP-N