I am upgrading the fuel pump and filter. I am also going to check for exhaust restriction. I was going to install thru-hull, but I left the exhaust stock. Changing advance springs to the medium springs instead of the heavy ones. According to Accel the heavy springs limit the advance to 20 degrees, so I'm at 32 max. Curve will come in a tad bit sooner and be all in by 3000 instead of 4000. I'm going to just tinker here and there until I find the culprit. I have access to 4 inch. thru hull fittings if I find a restriction.