Hello,<br />My husband is helping our newly widowed friend fix the boat her husband bought not long before he died. It's a '78 chevy 350 marine engine(with omc 800 stern drive). Problem: where is the thermostat located? I'm trying to look online for any available schematics of the engine, but am having no luck whatever. Any help would be much appreciated. As it is not our boat, and we don't stand to profit, we'd like not to have to purchase a manual (but will take suggestions on which one if we should have to.)