It is your charcoal cannister. Although i'm not suggesting it. If you override it your problem will be fixed. I had the same problem on my 2017 2520. That cannister caused more fuel to go overboard into the water than it could save in fumes in 10 lifetimes.
I have a Rhodan on my 2017 2520 parker. Had a board go out on second trip. That being said they were VERY responsive. Customer service was outstanding. Keeping me loyal for now. I had mine mounted a little different. mine goes across the bow and slides under the rail. In my opinion its a cleaner...
2006 Parker 2320 Sport Cabin xld
Parker 2320 XLD. This deep vee pilothouse boat is in Like New! condition. It has been garage kept for all, but the last 2 years of its life. This boat is set up perfect with a 2006 Yamaha 250 HP motor with only 825 hrs. This 31' LOA boat is the safest most family...