I have a 1996 Lakeview with twin 5.7 GM motors with Mercury Bravo 1 out drives. The starboard motor has at times " run on " after shutting off the ignition. After de-winterizing this year the port motor has done it once also.
What I have been told so far is anything from carbon on the valves, to leaking carburetors, to fuel octane could cause this. Just wondering if anyone has had this problem or could give me an idea what could be causing this?