My echo srm-2100 starts up ok, but as soon as I hit the throttle it dies. At first last year it would only run at about half throttle, but I managed through some light duty work that way. Well this spring it has gotten to the point where i can't do anything with it. Put a new plug in and no gas to no avail. Going to grab a new fuel filter (air filter is good) tomorrow and some 91 octane fuel since I messed up and bought 87. I've never touched the carb adjustment, should I try to adjust the carb? Or is it beyond that? I was thinking about just buying a replacement zama carb, is that a good idea? They only run $40 and if they are simple to install it would be a lot cheaper than paying a shop to mess with it. Thanks in advance for any advice.