Ok,here is my problem.The last time I was on the water with the boat it was surging then would just die,restart and do the same thing so I took it in to a repair shop 90miles away.Ten days later they said it ran good,no problems.All they did was spark plugs,comp. test and tank test.Anyways today I took it out and seemed fine for the first ten minutes then some slight surging occured,throttled down and it died.cranked and cranked but would not start.Tried shifting it in gear then back in neutral and started,reved it up to 3000 and just died hard.Cranked and crank,nothing.Put it in gear and back it starts,got to the dock and it quit again,loaded it and came home.Any suggestions? It is a 1992 60hp Evinrude.Fuel filter is good,tank filter,bulb hard,gas vent,new fuel,plugs,all good. 