I have a 2007 Nautique with the 330 and Zero Off Rev R (dual puck)
The past few times I have been out it has been acting funny. It almost feels like a very minor miss or surge in the slalom course. You can feel it and you can hear it (barely), but the boat and zero off hold speed as normal. I tried RPM only mode to eliminate any GPS issues and even running with ZO off. Do note that I have a failed GPS puck, but one is still functional. (New puck on order) I still had the issue. I was hoping ZO would be the issue.
I have no check engine light and no out of the normal operation other than a slight noise/surge during 30+ mph runs.
I have no clue where to start on this. I am thinking I will completely disconnect ZO and see how the boat reacts. The boat has just shy of 700 hours on it. The oil, transmission and fuel control cell filter were all replaced in the last 100 hours.
Any thoughts or things I should dig into further? I don't know the problem is and I don't want to make things worse by continuing to run the boat in a degraded state.