Was on a week long fishing trip recently. Engine started fine, idled great and ran really well up the the last day. The last day of the trip I had a hard time starting it, when I got it started it ran good and idled good but as soon as I shifted it into gear it would die....would start back up easily and die as soon as I shifted it......I'd have to rev it real high and shift quickly to keep it running. Here is what I have done so far. Replaced fuel, fuel filter, rebuilt fuel pump, new hose and bulb, new plugs and removed and cleaned the carbs. The timing is spot on and I have good spark with all three plugs. Problem still exists. Any suggestions?