I was wondering if anyone could help with some information on a Ted Williams 7.5 HP engine I picked up. The serial number is #1323-11, and the engine was made by Tecumseh. I have the following questions:<br /><br />1) Year?;<br />2) Gas/Oil ratio?;<br />3) What spark plug does it take?; <br />4) I think that the engine is air-cooled, and that the lower unit is water-cooled with an impeller. Is this correct? What size impeller? and;<br />5) Can you run the motor with a flushing device, or does it need to be in a tank??<br /><br />Thanks for the help!!