I have a 2000 Mercury 50 hp 4 stroke. I have been having problems with the rpms spiking and falling out. It happens in gear and when idle. It has lost around 10 mph and only will rev to 4200rpms. Have had the carbs cleaned a couple times and had the fuel line replaced and new bulb oem parts. Anyone have any info on what might be wrong. My email is Joshennen@aol.com thanks Josh
