I have a 2009 2400 BRX that I recently re-powered with a Mercury 300 R and can't get it to stop porpoising without using trim tabs. I have a CMC manual jack plate with 5.5 inches of travel that came with the boat when I purchased in 2011. I have moved it in all positions but it doesn't help. Previously I had an Evinrude 225 HO Etec on the boat with the same jack plate and zero porpoising issues. I also did not have trim tabs. The boat starts porpoising at 35 mph and doesn't stop until I run the trim tabs down 4 positions. I also changed props from a 3 blade to a Bravo FS 4 blade but it did not help.
Just curios if anyone has had this issue?
Thanks,
Lance
Just curios if anyone has had this issue?
Thanks,
Lance