Guest 2401 Marine Battery Isolator 70 Amp Negative Ground - Used

Guest 2401 Marine Battery Isolator — 70 Amp Negative Ground

Application: Diode battery isolator for splitting charge from a single alternator to two battery banks on 12 V negative-ground marine and RV systems. The factory data plate rates it for use with a 70 amp alternator maximum. Three stud terminals, factory-marked 1 / A / 2 (battery 1, alternator, battery 2), mounted on a finned aluminum heat sink with slotted mounting flanges.

Condition: Used, untested take-out. Data label intact and fully legible, model number clearly readable, all three stud nuts present. Heat sink shows dust, light grit, and minor scuffing from prior service. No electrical testing has been performed — diode function is not verified and this unit is not represented as operational. Recommend a diode voltage-drop check before installation.

Included: Isolator only as pictured. No cables, lugs, boots, hardware beyond the stud nuts, or instructions.

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.