I just installed Stargazer (v9.12) and ZBox on my 2001 Sunsetter LXI with the 325hp Monsoon with Mechanical throttle linkage. I have the standard ACME 13 x 12 prop. I did the full Autocal and Course Mapping per the instructions and videos.
Full course times with skiers in tow are always within a few hundredths of nominal. The issue that I’m experiencing is that it in no way seems to behave like Zero Off through the course. I don’t here or see any significant rise in RPM as the skier adds load after a buoy. Also I have experienced the gassing into 2 Ball that others have noted especially with large skiers although that seems to be alleviated by going to a + setting (eg A2+).
Further, I’ve noted that a fellow ski club member with an early 2000’s SN 196 doesn’t seem to have these issues and in fact sounds a lot like ZO in the course. It also seems like others on BOS with similar Nautiques have expressed the most satisfaction with ZBox (eg @jhughes)
So finally, my question is for those of you out there who have successfully tuned ZBox for early 2000’s Malibu’s. What all did you need to do to get ZBOX to perform “like” ZO? Different lower pitch prop? Adjust KX, ZBX and/or ABC adj settings? Invert tach and/or get new throttle return spring?
Or am I just chasing a unicorn here?