wrecked my 044

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R Schra

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Today my 'old' 044 came in.

I loaned it to a division of our firm for cutting some hardwood Azobe. They wrecked it by not cleaning the airfilter and running a stump chain full throttle on 95 octane (1:35 mix). So it got HOT and LEAN i quess.
 
The replace piston and cilinder will be in tomorrow. Its been a bad year for most our Stihl's. We had about 5 saws with this kind of damage???? I only lost in 20 years working with a chainsaw one 066 in mid summer that got hot/lean sawing firewood logs from London Plane. Airfilter got jammed by that leavehairs and when the gastank got empty it seazed on me. (i cleaned the filter two trees before) Since then i run 98 octane mix and clean the filter very reguarly and no problems ever happend. This 044 i showed was inspected early may by me. I cleaned it inside out and removed the exhaust and no scars were on the piston to see. There was also no pitting on the cilinderhead or scars inside the cilinder to see (trough sparkplughole)
 
I noticed you are seized intake side,thats means she became very hot indeed.Be sure to take a leak test before using it again and maybe run it a bit more rich when cutting big wood.When your air filter became dirty ,your carb setting is becoming richer,so i dont think your seizure is caused by that.
 
You do realize that saws run cooler with 50 - 1 rather than 35 - 1 the more oil you add the higher the temp is required for combustion

scott
 
HiOctane said:
I noticed you are seized intake side,thats means she became very hot indeed.Be sure to take a leak test before using it again and maybe run it a bit more rich when cutting big wood.When your air filter became dirty ,your carb setting is becoming richer,so i dont think your seizure is caused by that.

You are right i believe, when getting a dirty filter the carb setting gets richer. What i meant is when running on a almost empty gastank i ran (and collegues keep doing) to long on 'fumes' before refilling. So then you are going lean isnt it? That pitting and scars are on the exhaust side btw.

You do realize that saws run cooler with 50 - 1 rather than 35 - 1 the more oil you add the higher the temp is required for combustion

Scott, interesting i will look into that. The oil we use we get in 60 liter drums and the specs state to use it 1:35. I will look into that to and maybe we need to change our mix oil to!
 
Well, you sure smoked that jug, but when I saw your thread titled wrecked 044, I thought someone dropped a tree on it.
 
oldsaw-addict said:
Well, you sure smoked that jug, but when I saw your thread titled wrecked 044, I thought someone dropped a tree on it.

I did once drop a tree on this 044, it survived. Just the top cap some dents.... To bad i havent pics of saws that were really wrecked by trees or motorized gear! I know we have two 084 wrecked, one by a tree and one run over by a timberjack. A 020T dropped on the pavement. And a 066 chipped in the BC2000 vermeer chipper.
 
OUCH!!!

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R Schra said:
That pitting and scars are on the exhaust side btw.

I was wrong.... its the intake side indeed. see the compression ring openings.
 

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