22117421 Alternator | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta D8 24V 80A Alternator, part number 22117421. A genuine heavy-duty 24-volt, 80-amp alternator used on Volvo Penta D8 marine engines. The charging assembly is catalogued in the D8A1-A MP installation around engine serial reference 700844815 and must be matched to the original pulley, brackets and belt system.

🚤 Compatibility

• Engine Family: TAD, D, TWD
• HP Range: Approximately 550-650 HP
• Year Range: Approximately 2015 - current supported applications

Full model list at the end of this description.

⚙️ Key Features

• 24V 80A heavy-duty charging output
• Factory mounting, pulley and terminal arrangement
• Integrated regulation for marine diesel electrical systems
• Designed for continuous heat and vibration exposure
• Documented OEM-manufacturer and aftermarket cross-references
• Engine type: 7.7L inline six-cylinder common-rail turbocharged marine diesel
• 64MM (Volvo assembly listing)

🔌 Function

Converts engine rotation into regulated electrical power for the batteries, engine-control system and vessel electrical loads.

⚠️ Common Signs of Failure

• Low or excessive charging voltage
• Battery warning or repeated flat batteries
• Bearing noise, pulley wobble or belt dust
• Overheated output cable or terminal
• Intermittent charging as the alternator warms

🛠️ 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

• 23023276 - later related Volvo Penta alternator used in selected D8 and D16 installations; verify serial before substitution

OEM / Related Numbers

• 3803639 - OEM cross-reference
• 21621101 - alternator bracket
• 21621111 → 23182845 - companion bracket chain
• 21750781 - belt tensioner
• 60111560 - drive-belt references
• 22954700 - drive-belt references
• 22054641 - support bracket

Other-Brand OEM Numbers

• Bosch / SEG Automotive: 0 124 555 129
• Bosch / SEG Automotive: F 000 BL0 7K4
• Prestolite: 861274GB
• Valeo: 202014
• Magneti Marelli: 063535550090

Aftermarket / Verified Equivalents

• SLP: ALT-355
• SLP: ALT-781, earlier aftermarket reference replaced by ALT-355
• AS-PL: A0138
• WAI: 12599N

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D8A2-A MP, D8A4-A MP, D8A1-A MP, D8A3-A MP
• Volvo Penta TAD1341-43GE-B, TAD1341VE, TAD1341GE
• Volvo Penta TAD1344-45GE-B, TAD1344VE, TAD1344GE
• Volvo Penta TAD1640-42GE-B, TAD1640GE, TAD1640VE-B
• Volvo Penta TAD1641VE-B, TAD1641GE, TAD1641VE
• Volvo Penta TAD1642VE-B, TAD1642GE, TAD1642VE
• Volvo Penta TAD1342VE, TAD1342GE
• Volvo Penta TAD1343VE, TAD1343GE
• Volvo Penta TAD1345GE, TAD1345VE
• Volvo Penta TAD1350GE, TAD1350VE
• Volvo Penta TAD1340VE
• Volvo Penta TAD1346GE
• Volvo Penta TAD1351GE
• Volvo Penta TAD1352GE
• Volvo Penta TAD1353GE
• Volvo Penta TAD1354GE
• Volvo Penta TAD1355GE
• Volvo Penta TAD1360-62VE
• Volvo Penta TAD1363-65VE
• Volvo Penta TAD1643VE
• Volvo Penta TAD1650GE
• Volvo Penta TAD1651GE
• Volvo Penta TAD1660-62VE
• Volvo Penta TWD1643GE
• Volvo Penta TWD1644-45GE
• Volvo Penta TWD1652GE
• Volvo Penta TWD1653GE
• Volvo Penta TWD1663GE
• Volvo Penta TWD1672-1673GE
• Volvo Penta TWD1682-83GE