I believe the motor is NOT running on all 3 cylinders !------It sounds awful to me.-----I am not looking for the number of the carburetor bowl !!----Read carefully-----The number on that metal tag is ???----The number on the high speed jet ( orifice plug ) is ????----Read the questions and answer if you are looking for help.----Do some trouble shooting .----Do not run engine the way it is now.----Find out and correct what is wrong.----Install a new impeller before launching the boat again.-----Good luck.-----I think I might step aside for now.