Twinfield
ArboristSite Lurker
Is it possible to have a good leak down and Vac/Press test and still have carbon build up on the valve(s) that would cause poor acceleration. It needs a little throttle to get it started either with choke or not and will Idle all day, but when raising the RPMs wants to die out. I have replaced and/or adjusted everything I can think of shy of opening it up and looking at the valves. It's a Stihl 4180 series engine. Thanks.