High Quality Chainsaw Bars Husqvarna Toys Hockfire Saws
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expert of nothing

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Yeah pretty much identical. I widened the intake on #2 literally the width of a fine point sharpie. That's the only difference.
Dj, sometimes air temp. and humidity make all the difference in the world, what was those conditions when you ran saw #1 compared to saw #2, just sayin.:) It's the little things that are sometimes overlooked.low baro. press. can kill rpm's.
 

Stump Shot

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I ran #1 this morning when it was cooler. That doesn't explain the difference in compression though. #2 runs good but doesn't pull as hard as #1.

The pin to crown measurement the same? Not all piston makers are the same in my experience.
 
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