mini mac running problem FUEL???

[newbee]

Hi folks A newbee here, I just finished tearing apart and cleaning a mini mac i got for free, the saw runs strong for a few seconds but then quits, starts fine right after but does the same thing..The air filter lookied like it had a fury cover over it as well as the fuel filter, anyway thought this was the way the parts are??
Thanks for any help

 

[McC]

That's what they usually do. Put it on a shelf and admire how clean it is. At least it won't get full of oil and sawdust.
Scott

 

[Gearhead1]

The first thought that comes to mind is carburetor problems, such as gum in some of the fine passages. I worked on one of those small McCullochs a few years ago that would not run correctly no matter how the barb was adjusted (after being rebuilt). The solution was to take the carburetor from a similar parst saw and rebuild it, and afterwards the little saw ran fine. Have you checked the compression? That would be a good indicator of overall engine condition. Also, you may be dealing with a leaking crankcase, which would involve major disassembly, resealing the flanges, and/or crank seal replacement. The latter is not really a practical repair for what the saw is worth.