I have an 2001 5.7 EFI 260 hp that I had new wires ,cap with rotor and new AC Delco MR43LTS PLUGS . Boat seem to run better before parts were changed seemed smother and quicker. I ask the dealer who did the work what gap he used on plugs he said 0.045 and thats whats on flame arrestor cover . I...
Hello everyone , Here is my problem I have a 2001 Sea Ray with a 5.7 EFI mercruiser. Boat starts, idles perfect around 750 , tops out great , around 4300 rpm's nice and smooth. But when I bring up to and only to 1000 rpm's run's rough to the point it will shake the boat. If I nudge up to say...
