Maradyne 2-Outlet Heater Core Replacement (9" x 5.5") Stereo it features a threaded barrel

it features a threaded barrel for a snug fit through the dash and multiple spade terminals on the rear for straightforward wiring to your boat’s ignition and accessory circuits

Ring and Pin

Malibu also used this for boats with Perfect Pass that used a paddle wheel to determine the speed

Its Medallion part number (found on the gauge itself) is 6703-00007-01

Built as a direct-fit core for Maradyne models only

Maradyne 2-Outlet Heater Core Replacement (9" x 5.5") Stereo it features a threaded barrelRestore dependable cabin heat with this replacement heater core designed specifically for Maradyne two vent 2 outlet heater systems. Built as a direct fit core for Maradyne models only, it features a compact, high efficiency fin and tube heat exchanger design to help transfer heat quickly and consistently. Ideal for replacing a leaking, clogged, or underperforming heater core so your heater can return to proper output. Application: Maradyne models