Two Volvo questions.
First: I have a set of Volvo 8.1 GiL inboards on my boat serial numbers 4012110666 and 4012110667. They are in my 2004 Carver 396. The starboard one idles at 600 rpm and the port one idles at about 750 to 800 rpm. I backed off the idle stop screw on the port engine but...