I have a pair of 2005 Johnson J140CX4SOR. RPM's get to 2800 and surge between 2800 and 3000 either at idle at the dock, in gear at the dock or on the water under load. All fuel lines, filter, primer bulbs and clamps are new and everything is tight so there's fuel getting to the engines. Both engines are doing the exact same thing and they share a fuel filter, Racor S3232, which is why I suspected a fuel delivery problem at the beginning.
I'm starting to think this is not a fuel delivery problem and something else.
I'm starting to think this is not a fuel delivery problem and something else.