Any kind of help would be great already made sure fuel system was o.k. which it is saw top voltage regulator that is mounted behind the metal plate that the ignition coils mount to looks burnt where you can see the underside where they put the protective silicone on the regulator you can see some blackness through the silicone was told in a previous post to disconnect the voltage regulators and see if problem goes away well it didn't so that's when I got out and hooked up my spark tester and had great blue spark on right cylinder bank and no spark at all on left cylinder bank heard it could be a switch box causing the problem but I want to be sure I heard all I need is a voltmeter and something called a D.V.A. adapter if so where can I get the d.v.a. adapter and where can I get the specs. For what readings I should get and which terminals to probe again the motor will start and run but very sluggish and no power thanks to all who respond you are greatly appreciated and one more thing when this happened the boat was running great I was at wide open throttle and all of a sudden it was like someone turned off a switch from running great wide open to barely going 10 miles an hour at full throttle thanks again...