Stihl MS180 Connecting Rod

[dogder]

Hi all. I busted a piston, bent a connecting rod and broke through the bottom pan using a metal piston stop:frown: Has anyone tried to reform and heat treat the connecting rod?? Can you acquire a replacement connecting rod?? Or should I try and get a replacement cylinder assembly?? I'm looking for the cheap way out. Thanks

 

[blsnelling]

Is this a joke, a play on past 170/180 failures? BTW, several other parts of that model are no more robust in their construction.

 

[nmurph]

How 'bout a replacement saw??? BTW, you're not the first person to bend one of those limbo rods, right Brad??:msp_tongue::msp_tongue:

 

[nmurph]

That's funny: I post and check and your are already posting in this thread!!

 

[blsnelling]

How 'bout a replacement saw??? BTW, you're not the first person to bend one of those limbo rods, right Brad??:msp_tongue::msp_tongue:

Nor the third or the fourth. Your money would be better spent on a better saw.

 

[Somesawguy]

You might try ebay. There may be some on CL that you could strip for parts, or use yours for parts. I don't think I'd put too much $$ into a $200 saw. :msp_sad:

 

[biggus]

I guess it's "good" to know it's not just me. I just got done bending a rod on an ms210 trying to do something as simple as taking the clutch off. Never in my life have I bent a rod doing this and I've been scratching my head all day long while I was on the road thinking over and over again, "How in the world could I have bent a connecting rod like that?" I found this thread searching for a related topic and now I think I can go to bed in peace, realizing that sometimes there is just junk stuff out there even if it's labeled STIHL.

 

[bcorradi]

Yes there have been many saw mechanics that have bent the conecting rod, but i have not bent one. To each their own.

 

[roostersgt]

I've learned from others mistakes. No "rope" trick or piston stop for me. I just borrow my neighbors air impact wrench. Not a problem yet and ,,,,braaaaaacccckkkk,,,it's off.

 

[THALL10326]

Yes there have been many saw mechanics that have bent the conecting rod, but i have not bent one. To each their own.

Shade tree yes, real ones no,:msp_wink::msp_wink:

 

[Tzed250]

Please now contemplate the quadrillion+ rpms that the 170/180 rods have successfully moved the piston up and down. If you follow the Stihl service manual you will not bend the rod, nor hole the piston.

 

[Fish]

shade tree yes, real ones no,:msp_wink::msp_wink:

ouch!!!

 

[sachsmo]

Shade tree yes, real ones no,:msp_wink::msp_wink:

Dang,

all the leaves are gone on my trees, guess that makes me a real one eh?

 

[old-cat]

Please now contemplate the quadrillion+ rpms that the 170/180 rods have successfully moved the piston up and down. If you follow the Stihl service manual you will not bend the rod, nor hole the piston.

Could you please explain how a STIHL piston stop can prevent internal destruction better than other piston stops?????

 

[rupedoggy]

Please now contemplate the quadrillion+ rpms that the 170/180 rods have successfully moved the piston up and down. If you follow the Stihl service manual you will not bend the rod, nor hole the piston.

quadrillion revolutions yes, quadrillion rpms no, more like 12,500.

 

[Tzed250]

Could you please explain how a STIHL piston stop can prevent internal destruction better than other piston stops?????

Because the Stihl piston stop works at the edge of the crown, not in the center.

quadrillion revolutions yes, quadrillion rpms no, more like 12,500.

Yeah

 

[BloodOnTheIce]

In my 6 years in the biz, only bust a hole in piston and it was a MS180 that was seized
and I want to see how much it took to bust one. 400+ inch pounds and a metal piston stop later it busted.

 

[spacemule]

Shade tree yes, real ones no,:msp_wink::msp_wink:

I knew this thread would bring you out! :hmm3grin2orange:

 

[blsnelling]

Yes, they survive under typical use and when carefully following the Stihl prescrived service practices. However, IMHO, that's still no excuse to build a saw that is so fragile to work on. There's no excuse to build a saw with a stamped steel connecting rod. The rest of the saw is nearly equally as fragile. That just need not be. We don't hear of these issues with the competition.

 

[old-cat]

Because the Stihl piston stop works at the edge of the crown, not in the center.

Ok, that takes care of the piston but what's to stop the rod from bending??