Josh84,
Remove the muffler and check that it is clean and the exhaust port first.
Next step replace the fuel filter in the tank and if you still have problems then you will have to replace the carby diaphragms.
They have a flag type governor with a spring which keeps the idle speed up from memory. I am sure that we have the information in the parts list and manuals area of the forum. If not I will upload it when I return at the end of the week.
