I had a jet boat that did that after fogging the engine for winter storage and it turned out the plugs were bad. Changed the plugs and the boat run normal again. Just a thought.
It was a lesson learned the hard way. My brother in law suggested the water proof box when we were installing the bow thruster. I just never got around to it.
Just make sure the black box that communicates with the joy stick stays dry. I thought I had it in a secure location until I hit a huge wave from a passing boat and took on water in the front seat compartment where it was. Well, it burned it out. That was a $200 error on my part. I now have...
I have the bow thruster option on my boat and love it. It helps with turning the boat in strong wind and current during slow speed operation in narrow canals.
I had a Golden lift at my condo in Cape Coral and had aluminum planks installed for the pontoon to sit on. They recommended only using two, but I had them install 3 for better support. It worked just fine. When I moved to a house last year, I moved the planks to the house lift.