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  1. woodworkingboy

    Mac 640 From Brian

    Nice trick, but in my sprocket's case, a file wouldn't touch it. Some hard azz stuff given to me by a local machine shop.
  2. woodworkingboy

    Mac 640 From Brian

    Too hard was probably the case, and it didn't help that the guy who used some laser set-up to cut a key way in it also put a hairline crack in. I didn't notice it until I got back to my shop. I thought about taking it back ant getting some refund, the cut wasn't cheap, but I figured he gave it...
  3. woodworkingboy

    Mac 640 From Brian

    My 090G is set up with half inch chain. It's classical for sure. I thought I'd be smart and make up my own sprocket for 3/8" chain, a somewhat elaborate process, since none are available to fit the saw. I never thought a sprocket could completely disintegrate like that...within two minutes...
  4. woodworkingboy

    Mac 640 From Brian

    That is one dirty chain. Give it a kerosene bath and make it purdy again!
  5. woodworkingboy

    Mac 640 From Brian

    I disagree with Larry who agrees with Brian... :D Angles on cutter faces for saw blades are pretty critical for less resistance cutting and clearance that also ties in with heat dissipation, they have it worked out what is optimal. I must assume it's the same for chains. That being said, once...
  6. woodworkingboy

    Mac 640 From Brian

    Probably the older chain had longer cutters, before the days when it occurred that they could gyp you. I have some have inch chain with cutters that are awesome long.
  7. woodworkingboy

    Mac 640 From Brian

    Good idea on fattening up the low speed a tad, worth a try. Thanks.
  8. woodworkingboy

    Mac 640 From Brian

    Excuse the thread distraction.... Al, do you know of a way to allow a bit more fuel to come out of the carburetor into the cylinder? I have a 242xp that I modded, and bumped the rpms up to 14,500, still with good four stroking. It runs great, but there is a slight hesitation at one point as...
  9. woodworkingboy

    Mac 640 From Brian

    Likely scenario you describe, skwel. An air leak won't remedy anything, unless the air filter was never cleaned and they at least got it to start with the washers in there, but highly unlikely.
  10. woodworkingboy

    Mac 640 From Brian

    I don't know what those old macs rev to, but the star washers might be an attempt to jack them up, by someone desperate.
  11. woodworkingboy

    Mac 640 From Brian

    Is there any anti-vibration built into that saw?
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