Up for sale is an original factory OEM marine engine cooling thermostat housing assembly. This heavy-duty metal housing was pulled from a freshwater engine and functions as intended. The item retains a portion of its original red factory warning decal on top.

Please note that due to standard engine casting conditions and weathering, the stamped casting number sequence on the housing (50359) can look similar to "8083" at a glance. It corresponds to full factory part number 3850359 and interchanges directly with assembly number 3850360.

Engine Fitment:
This style of thermostat housing is widely used on late-model GM-based marine engines:

Condition Note:
This is a used marine component. It shows expected signs of cosmetic wear, minor surface oxidation, and engine grime from normal operation, but the hose ports, body structure, and mounting channels remain structurally solid.