Can you guess what got this 660?

[jmssaws]

This is one of my mild work saws for a local logging company,this saw has been in the timber 6 weeks since I built it.
What do you guys think happened?
I'm certain I know what did it.

 

[jmssaws]

 

[idiotwithasaw]

Air leak on clutch side?

 

[jmssaws]

Air leak on clutch side?

Good guess,I thought that at first until I looked really close.

 

[idiotwithasaw]

Piston or cylinder out of round?

 

[jmssaws]

It was working on a 4 corner seize.

 

[Stump Shot]

Lubrication?

 

[Tpagel]

Is there a decomp on the saw?

 

[jmssaws]

Lubrication?

Ding ding ding

 

[jmssaws]

50:1 ish with orange bottle stihl mixed with the worst gas you can find.

This poor saw is bone dry inside.
I'm eating a piston but there changing there fuel and oil practices.

 

[junkman]

I would have guessed the Stihl spit out the Husky piston because it tasted horrible .

 

[Redfin]

Im guessing someone trying to join the prm club without having the proper shirt.

 

[jmssaws]

I would have guessed the Stihl spit out the Husky piston because it tasted horrible .

That's really what happened.

 

[idiotwithasaw]

I wanted to say straight gas, but I thought I saw some oil on the piston skirt.

 

[Stump Shot]

The mild scoring directly opposite the heavy scoring was what gave it away. Gotta have good and plenty of a lube if ya wanna go fast! I would not be surprised if it was less than 50/1 by the looks of that piston. Maybe mark the tanks with your recommended ratio before they go out might help ya in the future. I had heard that dealers have some kind of a strip they can dip in the fuel in the tank to see how much oil is in the gas, is this true, anybody ever heard of such a thing and if so where could they be acquired? So far I've been lucky with guys that have straight gassed saws,they knew it, but there's always that one guy...

 

[Sty57]

View attachment 26012

Cold Seize

 

[jmssaws]

He was topping the last tree of the day when it quit,I build all there saws the same,machine work for the piston and a muffler mod and 010 off the key and that's it,no grinding. There very strong too and this is the first out of many that has had a problem premature.
I think a simple shake of the fuel can would have saved this one.

There switching to lucas at 40:1 with 89 octane gas.

 

[Stump Shot]

Ethanol the culprit I take it then, or is oil settling?

 

[jmssaws]

It was a combination of *s-wordty gas and *s-wordty oil,at 50:1 there's no room for error.
I first thought it was straight gassed but it's not,it has a little oil but damn little.

If your gas can sits all day in the sun is think a good shaking before you fuel up is a good idea.

 

[panteliss]

Is just a saw from a loging company , the boss pay for the saws and the operators dont give a sh1t for the equipments

dont worry , the boss have money................... he buy news