Carb Problem?

[RX86JS]

My 550 with a 44 SBN will idle well in the water and rev up to about 1/3 throttle, then it just falls on its face with more and then dies at about 3/4. When I adjust the high and low speed it doesn't change anything. It ran pretty good last year. I rebuilt the carb over the winter and when I was replacing the pop off spring I think I put in the dull silver one. I was wondering if this could be the problem with it not running well at all.

[ski4]

is the spring not the same as what you had before?
if so you changed your pop off and very well it probably is your problem

[tom21]

did you check the popoff? and also take the fuel selector switch out and see if you can blow though it. they get clogged up over time. I always see that prob.

[RX86JS]

I think that it had a shiney silver in it and now i believe it has a dull silver. It was very hard for me to tell the difference and that is the only thing that could have changed.

[ski4]

that would for sure change things though