I have a 1994 Carver 350 Aft Cabin with twin Crusader 454XL Series engines with an idle issue I am trying to track down. Elevated idle speed (anywhere from 1000-1600 rpms) seems to only happen after cruising at 3,000 rpms or higher. I can run all day at less than 3,000 rpms and elevated engine idle speed problem doesn't pop up. Restart corrects the problem. Checked linkage, secondary barrels, and choke. Choke wide open. Not linkage issue and secondary barrels aren't sticking open. Also, I lubed everything up good. Last season starboard engine acted up and this year it is the port engine acting up. Seems to be an electrical problem because a restart always corrects the problem so far. If I adjust the idle speed stop screw while engine is idling high and lower the idle speed that way then after a restart engine won't idle because idle is set too low. Idle problem doesn't happen every time, but frequency seems to be increasing. Does anybody have any ideas or have you had same problem? Thanks.