OE 346 broken cooling fin - run it or throw it

[mainewoods]

Saw runs strong, doesn't seem to overheat. Second fin down is cracked 3/4 of the way across. Your opinions are valued.

 

[Stihlbillie]

Run it, not gonna affect much

 

[Cantdog]

Yep run it.......our temperature conditions are generally cooler than most folks have and the fin loss won't change your overall cyl temp...be better if it wasn't broken but pretty much a non issue on a small saw not used in heavy milling or similar.....

 

[Landmark]

throw it out, it's junk. I will pm my address..................

 

[blsnelling]

Run it.

 

[Big Block]

Run it

 

[svk]

Run it unless it needs to come apart for another reason. Although if you saw Marshy's thread he had someone weld several broken fins back on a crushed 285. Looked good.

 

[Paragon Builder]

Run it.
Pull it off port it and run it some more!
Or send it to @drf255 to "fix"


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[mainewoods]

I would think that a high revving 346 might get a bit compromised in heat dissipation with fins(fin) missing. Never ran a saw with broken fins before. Would running 32 or 40:1 mix, and a little richer setting, to cut down the chance of over heating, be helpful?

 

[Paragon Builder]

More oil actually runs hotter. It's the fuel that cools. I can't see one fin missing getting hot enough to hurt anything, especially with a good muffler mod which really helps get rid of the heat.


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[mainewoods]

Good point on the MM. Didn't realize more oil in the mix creates extra heat.

 

[mainewoods]

Guess I should be running high octane fuel, might help keep the heat down some. 80 mile round trip to the nearest 110 pump though.

 

[sunfish]

Guess I should be running high octane fuel, might help keep the heat down some. 80 mile round trip to the nearest 110 pump though.

No, high octane does (supposedly) run cooler, but not enough to notice and it will make less power.
There is no good reason to run more than 91 octane.

 

[Paragon Builder]

No, high octane does (supposedly) run cooler, but not enough to notice and it will make less power.
There is no good reason to run more than 91 octane.

This ^^^^^

 

[mainewoods]

No, high octane does (supposedly) run cooler, but not enough to notice and it will make less power.
There is no good reason to run more than 91 octane.

Well, maybe one semi-good reason, no ethanol.

 

[sunfish]

Well, maybe one semi-good reason, no ethanol.

Maybe, but I still don't like high octane. We have 91 E-free here.

 

[Paragon Builder]

Well, maybe one semi-good reason, no ethanol.

Or just buy vp or trufuel. Your just paying big money for low performance with high octane.

 

[Agrarian]

Well, maybe one semi-good reason, no ethanol.

Our 91 octane in NH has the 10% ethanol. I'd have to drive 3-4 hours to find non-ethanol.