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Lakeside53

Stihl Wrenching
Joined
Dec 25, 2004
Messages
24,802
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1,870
Location
Woodinville, WA
Hold off you saw techs... let the others guess first..

A 2004 MS440... What caused it?? What 10 cent fix you be done to stop it from happening again?


Piston - past its prime

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Carb... seen better days...

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The saw is now running fine...
 
No flocked Air filter? Little bit of water/snow/ice got in, caused some extra detonation/higher temps in cylinder?

....go ahead, laugh, I am a newbie....:greenchainsaw: :help:
 
ok I'm stumped
The damage to the exhaust side of the piston is one thing but damage to the carb also :bowdown: :bowdown:

:popcorn: :popcorn: :popcorn: :popcorn: :popcorn: :popcorn:
 
i killed a weed whacker like this i left it on my landscaping trailer out in the open and with the small hole in the exhaust pointing up the piston was down the water went through to the carb and rust flakes and loose carbon ate my piston right up
 
ok 2nd guess the case got filled with water? third guess wait im about stumped on i know the inlet screen was changed/cleaned

No suckback preventer.

Sheesh, everybody knows that.
im with larry
 
So far I'm discouraged... you guys actually keep your own saws running??

What I showed is not uncommon - I see a couple a month that bad, and MANY with the potential.
 
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this must be a west coast thing or someone beats saws more than my stepfather if thats possible, oh yea i remember you lent that saw to the neighbor isn't that how those things go?
 
Andy,
This is like torture, please tell us. The anticipation is killing me! AHHHHHHHH!:dizzy:
 
Just a guess

I'm going with either fuel or fuel filter.








I can edit for 59 more minutes if I'm wrong though:)
 

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