View Full Version : 79 ThunderbirdFormula with twin 181bs

05-04-2006, 04:33 PM
"Well I did buy the boat and noticed that after a wide open run the port engine got hot and started spewing steam out of it. I shut it down and cruised home on the other engine. I fired it back up when cooled and same deal, started getting hot. I did notice, though that the pressure cooling cap on the top of the engine was loose. Could a loose cap cause the engine to overheat or am I looking at a more serious problem? I'm a competent mechanic and so I would like to find a repair manual that explains the engine and its fittings so I can repair it. Supposedly the engines were both recently rebuilt. They are 4 cylinder inline 181's how do I find information on them? The outdrives are OMC 400's. Thanks, Roy"

05-05-2006, 03:04 AM
You probably have lost the raw water cooling. The impeller for that is in the drive! What do you mean by pressure cooling cap? Is it a twin circuit coolng?