this prob wasnt the smartest thing to do, but all i rapped was the reciever box, its always wrap in plastic so it never gets dirty then i took my truck muddin, mud higher than the tires.... this is what it looked like
with the body on i took a pressure washer too it and just soaked it, got all the mudd off pretty much and then i took it apart and cleaned it really well with nitro force and paper towls.... the ez start and servos and everything are fine. nothing got ruined... how ever my friends revo ez start motor quit working... but that shouldnt have been caused by the water, it was prob just a freak accident, since water doesnt hurt a magnet.
heres one more for shits and gigggles
so bascially my tip, is cover your reciever box in sarran wrap or something so its always clean. the servos should be pretty much water proof, mine have been thru A LOT of water and they are still the stock servos that came on the truck. you can also wrap the ez start too if you want.