I have a 30 h. Evinrude that runs fine ,then it starts bucking and as long as you don't open it up to much it will run. when you try to open it up it bucks. stop pull the top off to look around ( at I don't know what) start it, open it up and it runs fine ,maybe all day maybe not. Any ideals??????????:confused2::confused2::confused2: Thanks for all help.