What oil is best? and what ratio?

[3browns]

I would love to see a picture of the entire saw to see if the paint on the bar was toasted as well

The whole damn saw would have been smoking

I guess it could be operator error but man oh man, if it was this is some short bus stuff right here.....

 

[andyshine77]

I honestly don't know how an engine could keep running long enough to cause that much damage. Amazing.

 

[bwalker]

I honestly don't know how an engine could keep running long enough to cause that much damage. Amazing.

On high performance engines I have seen that sort of damage happen in seconds.

 

[3browns]

On high performance engines Inhave seen that sort of damage happen in seconds.

What would or could be the cause of catastrophic damage that bad in a matter of seconds?

 

[andyshine77]

On high performance engines Inhave seen that sort of damage happen in seconds.

I just looks like damage that was done over time IMHO, not sudden catastrophic failure.

 

[bwalker]

What would or could be the cause of catastrophic damage that bad in a matter of seconds?

Detonation.

 

[bwalker]

I just looks like damage that was done over time IMHO, not sudden catastrophic failure.

On a saw you are probably right.

 

[3browns]

So are we back to some sort of fuel related cause?

The repetitive nature of the damage kind of rules out part failures I would think

Or are we sticking with "operator headspace"...

 

[bwalker]

So are we back to some sort of fuel related cause?

The repetitive nature of the damage kind of rules out part failures I would think

Or are we sticking with "operator headspace"...

Air leak induced lean question would be my guess.

 

[bwalker]

Of all the seizures I have seen only one could be attributed to fuel and that engine was very marginal for pump gas compression wise. The rest were caused by lean conditions as a result of mostly air leaks, but some times temp.
Given the low compression ratios of saws I would wager that just about all burn downs are a result of air leaks or severely lean carb settings. Even with really lean carb settings its tough to burn a saw down.

 

[junkman]

Of all the seizures I have seen only one could be attributed to fuel and that engine was very marginal for pump gas compression wise. The rest were caused by lean conditions as a result of mostly air leaks, but some times temp.
Given the low compression ratios of saws I would wager that just about all burn downs are a result of air leaks or severely lean carb settings. Even with really lean carb settings its tough to burn a saw down.

You left out operator error ,some people should not be around 2 strokes.

 

[bwalker]

You left out operator error ,some people should not be around 2 strokes.

If the carbs set right and there is at least some oil in the gas a two stroke OPE engine is very tough to kill.

 

[Flatzout]

Only the operator knows what he or she did to those 362's.

 

[Deets066]

Only the operator knows what he or she did to those 362's.

Or..... they don’t

 

[danimal]

Or..... they don’t

Xactly. Idiots tear chit up and clueless as to what happened.
Like a fella rented da house across da rd couple winters back.
Was using bar oil for his 2stroke mix.
( hey! why aint this saw running like it was last wkend)
Ya cant fix stupid.
Which these new puter saws are, by the way.

 

[Deets066]

Egt’s are gunna tell you more than anything. Aluminum melts at around 1250 from what I’ve heard. I’ve seen 2 strokes live at 1325 egt but that’s walkin a thin line

 

[Wood Chopper]

So let me ask a question That I’m sure has been brought up more than a few times elsewhere how important is the flash point of an oil. I’m running Amsoil saber at 40 to 1 contemplating going to something with the higher flashpoint like Motul 800 2t. I’ve never had a problem so I should probably just leave well enough alone I just think it’s interesting


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[Deets066]

So let me ask a question That I’m sure has been brought up more than a few times elsewhere how important is the flash point of an oil. I’m running Amsoil saber at 40 to 1 contemplating going to something with the higher flashpoint like Motul 800 2t. I’ve never had a problem so I should probably just leave well enough alone I just think it’s interesting


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Motul 800 doesn’t burn very well in a saw

 

[Wood Chopper]

Motul 800 doesn’t burn very well in a saw

That’s what I was thinking. Thanks for confirming


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[RI Chevy]

I think the Klotz Benol would do better with high heat.