My 9.9 4 stroke will run for 20 minutes when it is cold then cough really bad and shut off. I just had a guy put in a new water pump and head gasket in the motor. That cost me $300. I am really frustrated with this motor. It seems to get hot enough that you cannot even put you hand on it for 2...
Help Please!!!! I have a 1999 Evinrude 4 stroke 9.9 hp motor that will run great for about 10-15 minutes then it will start to spudder and run really rough and then it will quit. Wait 5 minutes and it will start and run fine for a minute or two and quit again. I have changed the plugs...
