Auto-tuned piston

[Mastermind]

I see the problem.......the piston is broked.

Roll Tide did it. :msp_unsure:

 

[iowa]

Has the saw always ran bad and the workers didn't like using it because of that reason? Maybe it was cracked right away and gradually got worse? It was obviously still running since owner said it needed carb work.

 

[Jacob J.]

I see the problem.......the piston is broked.

Roll Tide did it. :msp_unsure:

There you go again, with a bunch of finger pointing...umpkin2:

 

[Mastermind]

There you go again, with a bunch of finger pointing...umpkin2:

Kiss it here.......

 

[the westspartan]

At this point I don't know what happened. The saw is 100% stock, and doesn't appear to have a lot of hours on it (saw is in good condition and there is still visible crosshatch in the cylinder bore). It was in commercial use for one year, but according to the owner wasn't used heavily because none of the crew liked running it.

While this saw was torn down, another customer came in the the shop, also a logger, and had some choice words for his 576AT that also "blew up", but in less than 6 months. He took it to the dealership where it was purchased from, he didn't know the details other than that they told him the engine was blown and it wasn't worth repairing. I don't believe I know a single person around here that has had a good experience with the 575 and 576.

I don't blame them. I hate hate running saws with broke up pistons like that!

 

[naturelover]

Someone here mentioned something about warming up the strato saws before burying them in the cut.

Just wondering....

 

[LegDeLimber]

That's why Ya gotta run with two rings!
They hold the pieces together better than just one ring.

 

[madhatte]

Theory: perhaps the PWM (pulse width modulation) scheme the Autotune uses to deliver fuel isn't coordinating with the ignition properly, resulting in an advanced condition, resulting in detonation. That would be an entirely electronic problem.

 

[o8f150]

a little bit of jb weld and your good to go

 

[mitch95100]

he was making a port in the piston. a little JB weld will fix it

 

[Arrowhead]

Impurities in the cast.

 

[67L36Driver]

Impurities in the cast.

Or, melt not up to temperature when cast.

Some kind of production mistake.

 

[jnl502]

P.o.s???