2″ Delco-Style Mounting; Typical for Volvo Penta (Gas & Diesel), John Deere, Perkins, Mercruiser, Pleasurecraft, Crusader, Indmar, Marine Power & other GM-based Engines
This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Owner's Manual (pdf)
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![Balmar 621 Series Alternator - Spindle Mount(Single Foot) - 100A - 12V [621-100-SV]](http://www.essentialmarineservices.com/cdn/shop/files/68758XL.jpg?v=1702417747&width=1445)