Chainsaw Repair

I don't know a whole lot on the autotune but recently purchased a new saw.  I went and talked to 4 local dealers a year ago and none of them recommended a saw with autotune.  Just did some searching around and see a lot of mixed reviews on the autotune, lean burn downs, hard starting when hot.   Husqvarna claims 20% less fuel usage and 60% less emissions, well these saws have to be on the edge of going lean, so it will not take long to scuff a piston, so if the autotune fails, well you know the result.  Its to new of a development to be trust worthy if you ask me.


 Right..  Auto tune on the edge with rev boost, a bit too lean.     Steve

By the way, I bought a 390xp.  : )

I don't know a whole lot on the autotune but recently purchased a new saw.  I went and talked to 4 local dealers a year ago and none of them recommended a saw with autotune.  Just did some searching around and see a lot of mixed reviews on the autotune, lean burn downs, hard starting when hot.   Husqvarna claims 20% less fuel usage and 60% less emissions, well these saws have to be on the edge of going lean, so it will not take long to scuff a piston, so if the autotune fails, well you know the result.  Its to new of a development to be trust worthy if you ask me.

By the way, I bought a 390xp.  : )

Wrong, wrong, wrong and wrong I'm afraid. Many dealers are simply not up to speed with the AT saws. They don't even have the diagnostic tool and many that do don't know how to use it. These guys will continue to steer folks away from AT cause they're scared of it. Don't know how long they plan on staying in the business, because AT is the way things are going to be.

The hard starting was due to lack of reserve voltage in the coil; nothing to do with AT.

Early 562's had case bolts that could back out, and that was the cause of some lean outs, not the AT.

If the AT fails, it defaults rich and can't wipe a saw. I've seen several 576AT's that were saved by the auto-tune dumping in extra fuel to compensate for something like a **** boot.

End users and dealers alike tend to blame everything on autotune cause they don't understand how it works. I mean if a tree falls the wrong way, it must be the auto-tune right?