Motor: Mariner 175 Magnum EFI [OD177611]
After solving the starting issue a while back, it starts fine, gets on plane fine and will cruise at about 4K RPMs which is about 3/4 throttle. But when I push it further to full throttle the motor will bog down and make like a low growling noise, will buck and vroom..vroom..vroom and drop RPM unless I back off the throttle to about 3/4 then it jumps back up like nothing happened. First thought was its starving for something, recently changed fuel lines and diaphragm kit so any suggestions for the fix would be greatly appreciated. I read on another thread to push the key in while doing this and it seemed to have no effect unless I was looking for the wrong thing.