This thermostat is used on most Universal Diesel engines. The factory part number is 200217. The thermostat opens at 160 degrees.
As the design details sometimes change, decide if this is the correct thermostat by measuring the outside diameter of the flange rather than by trying to match the appearance.
Applications include these engines (and the boats that we are aware used these engines... There could be other combinations as well):
This part number is only valid for the B series engines with an engine production date up to March of 1998. If your engine was built after that date, order our part Z3355 below in "May we also suggest:."