I have a brand new 2007 Larson 180 Sport with a 3.0 Volvo Penta SX. I noticed that the idle RPM at 155 degrees is 1100. It was shifting very hard into gear. I tried backing it down. Currently it is set at approx 850. This is just over the lowest setting it will tollerate w/o sputtering or stalling. The carb is a holly 2 barrel. Is this the right setting? All I did is adjust the Idle screw. Is there anything else to check? These Volvo drives come with a dipstick 14mm on the top of the drive. I checked it per the manual and it is full and clean. Gonna seal trial today to see if it helps. Thoughts?