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ARCO Marine Premium Replacement Alternator w/65mm Multi-Groove Pulley - 12V 70A [20800]

Save $54.55 Save $54.55
Original price $243.50
Original price $243.50 - Original price $243.50
Original price $243.50
Current price $188.95
$188.95 - $188.95
Current price $188.95

Premium Replacement Alternator with 65mm Multi-Groove Pulley - 12V 70A

Replacement alternator that will fit Mercruiser 4.3L - 8.2L, 1998-Up, 12 Volt, 70 AMP, Internal Fan, 65-mm multi-groove serpentine pulley included.


  • All alternators are engineered for performance and reliability
  • All alternators are engineered and manufactured with precision and quality
  • All alternators must meet or exceed OEM performance before being boxed

Warranty Information:

When properly installed, all ARCO products are warrantied against defects in materials and workmanship for a period of 12 months for leisure use and 90 days for commercial or racing applications. 

Add an extra year of warranty to your rotating electric ARCO product (Tilt/Trim Motors, Alternators, Outboard Starters, and Inboard Starters) when you register your product within 30 days of purchase. You can register your product by visiting 


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This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.


  • Amperage: 70A
  • Voltage: 12V
  • Box Dimensions: 7"H x 8"W x 8"L WT: 7.6 lbs
  • UPC: 693006008172

Quick Guide (pdf)