Our company uses many redmax backpack blower and handheld blowers including HBZ2610 and EBZ7500. We've had numerous problems keeping them running. I recently discovered that there's a small hole above the fuel line. If you stick a small screwdriver (like eyeglasses use) in that hole while the blower is running and apply pressure, you can turn the adjustment screw inside and adjust the carburetor. It's worked on both types of blowers as well as our BCZ2460TS trimmers. We've replaced a few...
Redmax Carburetor problems and testing/adjusting
Redmax Carburetor problems and testing/adjusting