I have dual BF225 outboards; during high speed turning to starboard both engines drop to about 4500 RPM's the engines only drop RPM's when turning to starboard. The engines will make max speed when operating in full throttle and will continue to hold RPM's during high speed turn to the port. We are getting no alarm codes and rigged up a portable gas line to check to see if the gas line had deteriorated inside with negative results. If we could get any help it would be much appreciated.