a little background I bought the boat in 2018 ,the previous owner stated he never ran it over 3000 ,I did the same but was curious to see 4000-4200 and it would misfire ( port) at 3100ish ,and it would run 15-20 deg hotter (starboard 160) I put 65 hours on the motors that season , last year she didnt go in the water,this year I soaked the port raw side cooling with barnicle buster and it seamed to run sweet I took the boat out saturday she ran nice however I still couldnt get past about 3100 I ran about 3 1/2 hours ,sunday I go out and the port motor starts misfiring at 2200ish so I figured new plugs,wires,cap,rotor ,I replaced the plugs and wires and fired it up , same issue ,I took a video yesterday but I'm having problems loading it here it sounds like a popping or miss fire maybe a clicking sound ,let me know what you guys think ,thanks