Craftsman Backpack Leafblower

[Leafblowerguy]

I have a Craftsman Backpack Leafblower 4 cycle engine. I can start and it will idle but when I move it to run it loses power. I replaced the carburetor, spark plug and spark arrestor screen looks fine. What else could the problem be? Looking for suggestions and advice. Thank you

 

[Fish]

It is running lean, if not from the carb, it could be fuel starved from a cracked fuel line, clogged fuel filter, a leaky intake manifold, or blown seal.

 

[tom3]

Did it do this with the old carb?