I have a 1990 four winns 5.8L w/cobra outdrive. She idles well for about an hour, then, won't idle. She will idle again, after sitting for 1/2 hour or so. She runs all day at cruise,(3700rpm) The temp gauge never gets over 200...Do you think it is a temp problem....or a fuel problem. Have changed out the fuel seperater. Put heet in the tank. She is a fresh water boat with only 188 hours on her. She has sat for most of last year. I just don't understand why after sitting she idles again?<br />Any help would be greatly appreciated.<br />Thank you,<br />Joe