I posted a thread about this sort of problem I had a little over a year ago on here. When I just installed a Place Diverter with all the normal hardware and upon slowing down, I too used to get a large amount of water that would spray over the engine and headers more on the right side, it drove me nuts! Here is what completely solved my problem, I went to Place Diverter and Controls and spoke to Tim Place about this issue, I found that it was the forward / reverse bucket cable and arm that the water was ramping up and launching off of into the engine. He showed me a low profile forward / reverse cable arm and the bucket that has to be used with this style of arm, so I bought them, installed it and the problem was gone instantly. It’s just weird how only some smaller jet boat hull designs have this issue with how the water flows behind the hull and catches that arm and cable. Hope this helps you out, here is a picture of my set up and good luck, maybe see you at the river some day.
