jacob22
ArboristSite Lurker
I'm trying to tune my 660, the problem I'm having is the h needle. I started with a full tank of fuel, new air filter and fuel filter. I turned the h needle all the way in and backed it out a full turn. With a tach it's not is over 15000 rpm which is way too high. When I richen it up it doesn't seem to affect it much. I can get it to 4 stroke but after a few seconds it shoots back up over 15,000 rpm. Any ideas?