Alternator Marked C-7 Marine 6-Groove Serpentine Pulley - Used, Untested

Used heavy-duty brush-type alternator with a 6-groove serpentine pulley, finished in marine white paint and marked by hand "C-7 MARINE" on the case. Application: the handwritten notation points to a Caterpillar C7 marine engine, but the application is NOT verified — there is no legible data plate, manufacturer nameplate, or OEM part number on the unit, so no part number is claimed here. Appearance is consistent with a Delco Remy 22SI-style heavy-duty alternator; that is a visual impression only and does not establish interchangeability.

Condition: used, untested take-off. Externally complete with pulley, fan, rectifier assembly, and terminal studs present. Paint chipping, shop dirt, and light surface rust on the terminal hardware. No bench test, output test, or spin test has been performed — output, voltage regulation, diode condition, brush wear, and bearing condition are unknown.

Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase. Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.