twin 496ho 500-600 rpm diffrence??
 

I have twin 2002 496ho and the port motor idles at 1000rpm when you first crank it and the other is at 600 rpm. when you get up and running the port motor is always about 500-600 more, you can bump up the throttle one click to even out.i have checked throttle and cable adjustment and both are exsactly the same. whats wierd is after 15 min or so of running on plane or if you get on it the port motor idles down to 600 and both motors are the same the rest of the day but returns next time you put boat in water... checked codes and nothing? any ideas ? thanks