I actually didn't try to use the trimmer until today. It started easier than it ever did before and ran great. I had to make a couple of adjustments to the mixture screws from where I tried to enrich it before realizing it was the fuel lines. It actually never ran this well from day one, so I'm pretty sure the fuel lines were pinched where they go into the tank, because the OD of the lines was a little too big, which pinched the ID. Both lines had broken off at those pinch points. The new line is transparent and has a thinner wall. They're just big enough to seal the tank without pinching too hard.

Anyway, using it with the blower attachment requires the most power, which is a good test of how it's running. It was great - the most power the blower has had yet and the engine was completely smooth. I could have leaned it out for more of a 'scream' but it didn't need it. Plus, more fuel means more oil, and it was nowhere near actually showing oil smoke. And it wasn't '4-cycling' either - just the perfect spot between the two.

So for all those cheap 2-cycle trimmers out there that won't start and run like crap if they do, I recommend two things; a tool for adjusting the mixtures and 2' of fuel line to re-make the primer line and fuel line.

I fix a lot of 2 trimmers. It is my standard practice to replace the fuel lines, clean the filter screen inside the carburetor and replace the diaphragm and set the float setting.

Gasohol hardens the diaphragm and leaves deposits on the filter screen.

Just because the pump is working does not mean the diaphragm is not work hard.