So my FIL has an Echo PB-251 leaf blower that was running fine for about 15-20min, then it was 5-10min now you can start it but as soon as you go off choke it dies. So far I have gone through the carb and verified it was clean, and replaced a broken plastic throttle barrel. After getting it back together last night it start but as soon as you go off choke it would start to rev up and then die like it was losing spark when the cylinder pressure ramped up. I pulled the plug and it was wet with fuel but out of the cylinder spark looked decent. I checked the exhaust port /the muffler screen and both where fine. The spark plug looks good and doesn't appear to be very old. I'm going to get a new spark plug coming but does anyone know if Echo has problems with coils on these? I'm looking at a off brand coil for in the $20s vs $50+ for a Oem coil. I don't want to waste money on this but I'm suspicious that its just a spark plug issue. A seem like a more likely root cause.