Bogging down at higher speed

[steplift20]

Up date, I went out Sunday, ran the boat for five minutes and it's not right, loses power,bogs down at mid to high speed, the ball is firm, the one thing I did not mention,didn't think it would have caused it is that I told you guys I ran over a whale and when that happened I turned around and that's when all this started to happen maybe just a coincidence? I did change two fuel filters I'm thinking stator or carb ? But how do you check them?