IT MIGHT BE THE TEMP SENSOR ON TOP OF THE FRONT CYLINDER COST IS ABOUT 103, JUST REPLACED MINE YOU HAVE TO LIFT THE TANK UP PULL THE RIGHT LOWER AIR DAM AND YOU CAN GET TO THE BOLT THAT HOLDS THE TANK IN PLACE YOU MIGHT HAVE TO DRAIN THE TANK FIRST ,REMOVE THE POSITIVE BATTERY TERM FIRST ITS IS PERTY EASY ANY PROBLEMS CALL ME JIM 352 322 3448