Take off all the plastics and all the snorkels, the snorkels hold water when the Quad is completely underwater. New plugs are not in order, mine have been through 3 dunking and have survived. With all the plastics off, now is the time to do some mud maintenance. Take apart all the electric connections you can find, and and a dab a di-electric grease, I also like to use a spray, LPS-1 found at Ace, to keep water out of places I don't want it. I spray everything, fans, cables, levers, anything that can rust or bind up. Grease the bushings every other time out, it helps. I have 3 Uni-filters, when one is wet, run another. Wash the bike ever time out, or it will turn into one piece of solid crap.
There is some water somewhere in your air intake snorkel, take it off now with the plastics off and remove the drain plug on the bottom of the air box by the intake. There's water trapped somewhere. New air filer. If it still won't accept full throttle, let it dry for a week in the sun, then try again. Run some Sea Foam, or Marvel Mystery Oil for the first oil change in the engine, transmission, and diffs to get the water on the surfaces in there.
Keep going deep.
Last edited by gearheadesw1; 09-11-2018 at 10:25 AM.