Has anyone have a brand new OEM stihl piston explode within seconds of the first start?

[Welder56]

You said you rebuilt the carb, Did you set the metering lever flush to the body? I’m pretty sure the C1Q model zama carb is flush anyways.

As lonewolf said, have you vacuum/pressure checked the saw?

 

[GSully23]

I'm assuming you find it funny I've never dealt with a limiter cap on a 200t....but I've always bought them used and abused for the most part. Not trying to be disrespectful at all, especially since you've been so helpful. I pressure and vacuum tested using my instruments from work for checking gear cases....we use "stevens" pressure and vacuum gauges at my work and I used adapter to fit....using an old HD motocross tire to seal off exhaust and an extra stihl PN 1129 121 8600 to seal the intake?

 

[lone wolf]

I'm assuming you find it funny I've never dealt with a limiter cap on a 200t....but I've always bought them used and abused for the most part. Not trying to be disrespectful at all, especially since you've been so helpful. I pressure and vacuum tested using my instruments from work for checking gear cases....we use "stevens" pressure and vacuum gauges at my work and I used adapter to fit....using an old HD motocross tire to seal off exhaust and an extra stihl PN 1129 121 8600 to seal the intake?

Since the limiter is on the carb I'm assuming you didn't
unscrew the H jet and clean that port?

 

[GSully23]

No I didnt... I will do that tonight....this was a different limiter cap than I've seen with my other stihl saws. Like I said I honestly didnt notice until I pulled the carb to get the numbers for you this evening

 

[lone wolf]

Well it sounds like you might need a new carb . You going to buy OEM ?

 

[rd35]

Hmmm.....just read through this entire thread. Not one person mentioned the appearance of the break-out area on that piston. It's not shiny and silver. It is very discolored. In my experience, every time I see this condition...its a direct result of a crack propagation that has been in existence long enough to allow the metal to begin to discolor. So, in this particular case and with what I am seeing in the photo, I'd say that piston was cracked long before it was ever taken out of the box!

 

[blsnelling]

This is not a piston failure. That piston got caught on something in the transfer port. It didn't just crack, it was busted to pieces under force.

 

[blsnelling]

Hmmm.....just read through this entire thread. Not one person mentioned the appearance of the break-out area on that piston. It's not shiny and silver. It is very discolored. In my experience, every time I see this condition...its a direct result of a crack propagation that has been in existence long enough to allow the metal to begin to discolor. So, in this particular case and with what I am seeing in the photo, I'd say that piston was cracked long before it was ever taken out of the box!

That's simply poor lighting. Zoom in on the pic I copied. That's all fresh metal.

 

[HarleyT]

LOL. Yeah, that is a piston "failure"!!!!!

It failed when it hit that chunk of metal!!!!!!!!

 

[HarleyT]

Are you guys nuts????

 

[HarleyT]

Come on guys............

 

[HarleyT]

I get tired of folks trying to blame everyone else for when something goes "BOOM"!!

 

[67L36Driver]

LOL. Yeah, that is a piston "failure"!!!!!

It failed when it hit that chunk of metal!!!!!!!!

I can’t see WTF it is but it don’t look like anything normal to a saw. [emoji848]

 

[HarleyT]

OOOOOOOHHH.
Sorry to pee on your silly parades.....

 

[HarleyT]

I hear everyday, how everyone else is to blame....
But come on..........
Stihl is to blame for that stray piece of metal?????

 

[HarleyT]

OEM stihl piston explode within seconds"!!!!!!!!!!!!!!!!!

 

[HarleyT]

Or we could chase some internet rabbits for a few weeks.

lol

 

[HarleyT]

I can’t see WTF it is but it don’t look like anything normal to a saw. [emoji848]

Are you "chitting"????
Looks like a metal on metal hit!!
You have never seen anything like it???

 

[cus_deluxe]

Idk if youve noticed harley, but youve been talking to yourself for 2 hours now...just sayin..

 

[lone wolf]

Idk if youve noticed harley, but youve been talking to yourself for 2 hours now...just sayin..

Boys got some money in the bank or something.