At risk of starting WW3 about which Brands are best (I favor Stihl, Echo 2nd, Husqvarna 3rd) i was given a Husqvarna 125BVX handheld blower that defies almost every fix I can think of. Failure symptom is it runs for 30-60 seconds after priming via bulb, then it quits unless i periodically pump the bulb--all this while on either half or full choke. I have installed all new fuel lines, bulb, filter, carb and tested with fuel tank cap off/open. Fuel lines are transparent type so i can see fuel is not flowing to the carb. I have adjusted coil to flywheel gap so it gets a strong spark. I don't have a compression tester, auto store i usually borrow from isn't loaning due to Chinese Virus. I strongly suspect the Crankcase Seals are bad, especially the one opposite from Recoil Starter side (see photo). Cylinder walls are not scored, but piston shows some blowby. I figure as long as i am ordering new Seals for another $22-25 i will replace cylinder and piston and rings. Should be less than $50 to fix this blower which was given to me for free. A couple questions: 1) does the blowby/carbon on side of piston look normal? Unfortunately I have no idea how many hours this blower was used. 2) i have used arboristsite.com forum in past with some success, although replies have been slow/limited. Anybody know a better site? 3) do you think i am on the right track replacing Crankshaft Seals (as well as piston and rings and cylinder)? Gonna have a practically new machine! Thanks in advance for any input.