Author Topic: Tuning a saw  (Read 1336 times)

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Offline sharkey

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Re: Tuning a saw
« Reply #10 on: April 08, 2011, 05:04:37 pm »
After a rebuild I use heat cycles for stress relief. 

First time running a new piston, rings, bearings and cylinder in I double the oil in the fuel.  Start the saw, adjust the idle speed and set the engine to run for 10-15 min.  Once cool the unit then goes back up on the bench and I recheck all the fastners. 

For cycle two I keep the carburetion rich and begin to dial in the top speed and transition settings.  I set the top rich for a good four stroking.  Again allow to cool and then back to standard mixed fuel and final load based dial in from there.       

Just wanted to pass this along in case you have not heard of this method.  I really cringe when I see a newly rebuilt or brand new engine reved up when cold and put to the wood under full load.  Somewhere its published that a three minute warm up doubles the service life of the engine.       
   

 

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