New Echo PB650 running bad
I have an Echo PB650 with about 10 hours of time on it. Last couple of days it takes spells of running bad. Runs great sometimes then runs like it only has half power. Sometimes it surges and then it might run great. Does this when warm or cool, never know when it will do it.
Airfilter is clean, muffler looks clean on the screen, plug looks great, I have taken off the gas cap on the tank and it still does the samething...so fuel vent is not problem.
I am running 87 octane name brand fuel.
Have not taken it to the dealer yet because it might just run great when I do. Any ideas for me?
Also, is there a high speed fuel air mixture screw on that carb? I can't find one. Thanks. Dj
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