Have a 09 fi 700 rhino and having an issue with it idling, have 800 miles and never a problem until now. have to rev to keep running whether it is cold or hot. runs fine full throttle, but won't stay running at idle. My son I believe swamped, had water in intake, pulled plug on intake tube underneath and good amount of water drained out. Just does not want to idle now. any ideas would be helpfull. thanks in advance.