Yep, It's the vent/fuel cap that was giving me a real head ache. Ordered a new one and after talking to a tracker dealer I removed the vent screw (had to use a pair of pliers) and pulled a rubber seal out and trimmed plastic out of the seal area. Motor now runs 6,000rpmwide open n trimmed out with the two of us. Will be posting water temps and hopefully fish counts in a few days after we see grandkids .