This is my wife's grandfathers Echo gt-1100. I have it because I was fixing some fuel line leakage problems and also cleaning the carb to get it to run better. Well I took care of those problems but now when I start it the thing sounds like there is a bell going off inside the engine! I know that there is some kind of contact happening in there but I have no idea how this happened. I never opened the engine up or touched anything that would have any effect on the geometry of the internal movement.

So any guidance would be greatly appreciated and illl be happy to answer any questions you have to perhaps figure out the issue here.

Thanks!