Hi all.I have a 115 merc that bogs at the top end.It otherwise runs great but when up on plane if you gradually increase the throttle it gets to a point at about a little more than 3/4 throttle where it starts to bog.If you pull the throttle back a little it runs smooth and strong.If you play with the trim it will climb to about 5200rpm.I think the bog starts at about 4800 and pumping the ball doesn't help.I just ordered a fuel pump kit but im not real confident thats whats wrong.Oh yeah,the carbs are clean and all hose connections are tight. Thanks for any input.