Fin damage... To run or not to run...

[bplust]

Opinions? Saw is a 372, will cut 30 cord/year. Bore is perfect.

Thank you!

Bryan

 

[Canadian farm boy]

I'd probably run it. Maybe run it a little fat on the tune or try a higher octane fuel to help keep it a few degrees cooler. Opening up the muffler a bit will also help get rid of unnecessary heat.

 

[Gary Courtney]

Run it till she quits!

 

[beaglebriar]

I've ran a 385 for ten years that's in worse shape than that. Still blows 150psi. I cut 15-20 cords a year. If I was making a living with it I'd swap it out. For a firewood saw run it.

 

[bplust]

Sold! Thanks folks!

 

[P.M.P.]

Id run it maybe do a little grinding so it could breathe let the heat escape out the exhaust port.Anyone one ever try to jb weld fins back on?Or form your own fins?

 

[Canadian farm boy]

I'm sure I read about somebody around here repairing cooling fins and repairing muffler flanges. I can't remember who it was but I'm pretty sure @skippy would know who it was

 

[huskihl]

I think it was drf255 that welded them back on

 

[SixGun]

I've had tig welding done on a cylinder intake and it turned out beautiful. Never did fins yet but seems doable

 

[Canadian farm boy]

@drf255 was it you that had done cooling fin and exhaust flang repairs?

 

[beaglebriar]

I saw one that someone did over on AS that looked real nice. Actually got me thinking when I do overhaul the 385 I may take the old cylinder to work and try welding it up.

 

[drf256]

Ive done fin repairs.

 

[redtractor]

Anyone one ever try to jb weld fins back on?Or form your own fins?

I'd be curious about heat transfer through JB. It doesn't strike me as being a good conductor.

 

[drf256]

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[drf256]

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[jmssaws]

I know of a 660 that's a landing saw and has ran for 2 years with almost no fins.

 

[angelo c]

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Pssst. Don't forget to tell 'em yer shop rate is $15 per hour...and it took 40 hours to repair that awesome manly man jug some fool sent ya.

 

[jockeydeuce]

That cylinder will probably be fine forever....I have had saws on my bench that customers have been running for extended periods with the fins so plugged with pitch and gunk that the cylinder was pretty much a solid slug (Logging saws). Not only was there no air flow, but the cylinder was insulated! .....If kept clean, there's no way a cylinder like that won't last.

 

[Black Dog Chainsaw]

X2 on the welding. A cheaper option might be to use some aluminum brazing rod. It just needs enough contact to transfer heat. Pretty doesn't matter at this point, and it's not like they need to be real solid b/c they aren't structural.

 

[Mark71gtx]

What filler metal and Welding process do you use when repairing cylinders? The welds look clean, so I am assuming high frequency TIG? I normally weld stainless or carbon. The aluminum filler material is not something I am familiar with. Thanks!