Echo PB500H Backpack Blower

I'm working on this blower,I cannot get it to run off choke.I have clean the carb. 4 times in my ultrasonic cleaner.I have put a new carb. kit,replaced the fuel lines and filter.I have good compression 150#.I have took the muffler off and the spark arrester screen is fine.The exhaust port also is clean.The carb. on this machine is a walbro WLA.It has 2 very small holes where the needle adjustment screws are.Has anybody ever work on one of these carbs.I have worked on many 2 cycle carbs.,this is my first of this kind to work on.If I could find a way to turn these adjustment screws.I think the blower would run.No air leak,that I could tell.I appreciate any input.I priced a new carb. on ebay they sell for $88.00.Sorry for the long post.

Thanks,
Jerry

 

I agree that you probably have a little restriction at one or both adjustment screws and a little movement of them might get it going again. Push a 14 gauge wire connector over the screws to grip them and turn them.

 

Thanks,Cheese I will give it a try

Jerry