Hi, brand new here, first time with a 2005 4 stroke supercharged sportster,just purchased it from from florida,ran it down before i bought it for half an hour in a lake, no problems..brought it back here ran for 40 min hard with no overheating . Second time out after ten minutes of 5000 rpm plus i got a steady beep. i shut it down for 10 minutes and started it up running slowly for 30 min back to shore keeping it at 2500 rpm . no problems and no warning sound.As soon as i got it up with higher revs again warnin sound came back on immediately. A couple suggestions would be great before i take it to a local dealer. Coolant was a bit low in the fill tank. Oil was clean no moisture..motor sounds great and LOTS of power...