Need some help. Cannot get WOT from it. I've cleaned out the exhaust port(was not bad),cleaned out the muffler(tapped it to get the carbon out,also pretty clean),new plug,etc. It has been maintained from day one. The only thing left that I have not done yet is put in a new fuel filter.( It needs to be changed.) Would this be enough to cause the loss of power or have I missed something? Clogged fuel port maybe? Any ideas? Thanks!