I have a 1998 Mercury Force 40hp..I just got the motor and boat and I noticed there was very little water coming out of the tail tail..So I change the impeller and I am having the same issue.. I sprayed some carb cleaner up the tail tail as instructed by Mercury to see if there was something stopping the water flow that didn't help. I am getting a mist out of the tail tail instead of a stream of water. The motor starts and runs for about 200 to 300 yards and dies. I can feel the motor getting very hot. And the mist that is coming from the tail tail is very hot. I have no clue what could be stopping the water. I believe the motor is running hot that is way it's dying. I just need to know where to start to get the water flowing from the water pump.
Mav6759
Mav6759