I had some issues with this boat after ingesting water through a faulty gas tank. I replaced the tank, fuel filter, fuel pump, and rebuilt the carb, cleaned out the intake manifold, and replaced all plugs, cap, rotor. Had some trouble getting it to start, needing multiple throttle pumps and finally it came to life. The issue is that it now will idle for about 6 seconds at about 900rpms then it will jump to about 11-1200 for about 10 seconds, then drops back to 900. It does this constantly. Any ideas?