Is it white smoke or is it steam. Running thru mud you may have clogged the cooling system and the continuose beep would be the over heat buzzer. Did the buzzer shut off after idling for a minute? You may need to clean your cooling lines out, but first i would run it on the hose and see if water is comming out the pisser! Start ski, turn on hose see if you have water coming out then shut off hose turn off ski is the proper steps. If you turn off the ski with the hose running it will fill the engine with water and thats really bad.