Need ideas to stop porpoising?

[gss036]

Thanks for all the replys. Lots of information to think about. YES, I did have a stingray fin on the merc 200. I had thought about installing it but it does not look like a good fit to the honda. I saw on WestMarine site that they have a new type fin that installs w/o drilling but is 249.00. I ABSOLUTLY cannot go w/o my 15 Honda for a trolling for salmon fishing.
I had thought about the batteries, but that would take major work to do that, definately a good idea though.
I haven't tried top speed yet but I think it is going to be in the mid 40's as I got 44mph w/the 200 Merc. I only have 10 hrs on it now and I did run it up to 5K and was sitting at about 42mph. The last 3 trips have all been in 2-3ft chop so speed was not an issue there.
I like the idea w/the trim tabs, I will have to try it next time out. I was wanting to get out a couple more times this week but plans changed dramaticaly this morning, spent all day at the hospital w/wife and her 98 YOA mother and things are not looking good there, so I know where my time will be for a while now.
I will get back on the water ASAP.