What oil ratio were you running when your saw blew up

[romad10]

Amsoil Saber @ 40:1

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[Big Block]

I blew up a KX500 dirt bike on 32:1 due to crank seals. Only 2 stroke that I've had die.

 

[romad10]

Ive lost snowmobiles to crankseals ;/ 440 arctic cat el tigre expensive to fix . kawasaki motor. No more snowmobiles for me.

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[pro94lt]

In my tree service i'll have saws running all week. Never lost one @50:1. Even ran my old macs and homelites on that forbidden ratio.

 

[Big Block]

Ive lost snowmobiles to crankseals ;/ 440 arctic cat el tigre expensive to fix . kawasaki motor. No more snowmobiles for me.

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We used to have one of those monsters in the family. Cool machines

 

[Bwildered]

One of those curly ears broke off one of the wrist pin retainers. Had nothing to do with the oil. Kinda weird though.

It sounds as if it was a rebuilt saw?

 

[JimMorrison]

Yes it was, lived for five years after build and was a really good running saw, very strong. On tear down, the P+ C were in excellent shape, except where that little piece of steel wire messed it up. This thread reminded me of what happened and the memory still stings. Yeah, I know, kinda silly, it's just a saw. I have been entertaining thoughts of redoing the saw myself, but I think I will send it back to the builder. Too nice of a saw to mess with.

 

[HarleyT]

None of these failures could be blamed on the ratio, so the poll is silly.

 

[Rockjock]

None of these failures could be blamed on the ratio, so the poll is silly.

This coming from a dog with a cigar...

But you are correct it would seem that 50:1 protects as well as 40:1

 

[Deleted member 149229]

None of these failures could be blamed on the ratio, so the poll is silly.

You know the facts behind my Echo broken piston. Would a 40:1 mix have helped prevent the meltdown or was factory setting too lean. I know that without you doing an autopsy it's just an opinion but I'm interested what you think.

 

[Rockjock]

You know the facts behind my Echo broken piston. Would a 40:1 mix have helped prevent the meltdown or was factory setting too lean. I know that without you doing an autopsy it's just an opinion but I'm interested what you think.

No fault of yours. Besides if it was a lean condition it would have burned up long ago. No my friend you got some of the stellar Echo service that many of us have gotten.

 

[romad10]

You have to mske sure you dont have an airleak as well... Crankseals, etc.. Oil cant fix that.

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[HarleyT]

Hard to tell much from the pic....

But it ain't from the oil-mix ratio.....

 

[romad10]

Pic?

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[Deleted member 149229]

My trophy. 10 months old.

 

[romad10]

Break off piston or melted?

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[Deleted member 149229]

Broke. Melt down was just an expression.

 

[romad10]

Np. Mfg defect possibly.. Or just plain old dog tired..

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[1Alpha1]

I blew up a KX500 dirt bike on 32:1 due to crank seals. Only 2 stroke that I've had die.

I used to have a 1980 KDX 400. Bought it used. It was fast enough to beat my younger brother's 490 Maico Spyder in a drag race.

 

[Big Block]

I used to have a 1980 KDX 400. Bought it used. It was fast enough to beat my younger brother's 490 Maico Spyder in a drag race.

I believe it mine was a 1998. Big 2 strokes are flat out nasty!