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Re: Chainsaw recommendation [Re: robert.d12] #7820972
03/15/23 08:42 AM
03/15/23 08:42 AM
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Posts: 2,283
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lumberjack391 Offline
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lumberjack391  Offline
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I dont remember having an issue with adjusting carbs due to temp changes that much. Sure, I may have tweaked it a few times a year. Seems like cleaning an air filter regularly sure helped more than anything. What screwed me more than anything was vapor lock- why does one saw get away without any vapor lock and the same model sitting right beside it doesnt?

Re: Chainsaw recommendation [Re: lumberjack391] #7821016
03/15/23 09:35 AM
03/15/23 09:35 AM
Joined: Dec 2008
Posts: 4,421
Yukon
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yukon254 Offline
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yukon254  Offline
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Yukon
Originally Posted by lumberjack391
I dont remember having an issue with adjusting carbs due to temp changes that much. Sure, I may have tweaked it a few times a year. Seems like cleaning an air filter regularly sure helped more than anything. What screwed me more than anything was vapor lock- why does one saw get away without any vapor lock and the same model sitting right beside it doesnt?


Me either. Our temperatures will fluctuate from -50 to 90 degrees in the summer and i seldom have to touch the carbs on my older saws.


do unto others as you would have them do unto you

www.grizzlycreeklodge.com
Re: Chainsaw recommendation [Re: robert.d12] #7821019
03/15/23 09:44 AM
03/15/23 09:44 AM
Joined: Jun 2007
Posts: 16,150
Tennessee
Scuba1 Offline
"color blind Kraut"
Scuba1  Offline
"color blind Kraut"

Joined: Jun 2007
Posts: 16,150
Tennessee
My big Dolmar was a (This word is unacceptable on Trapperman) in that respect and not normal for sure. My Husky just needs a tweak now and then. but the Stihl on the other hand has always run just right. Even after I have messed around with porting it and doing a radical muffler job on it. It adjusts itself to the changed parameters just fine.


Let's go Brandon

"Shall not comply" with morons who don't understand "shall not infringe."
Re: Chainsaw recommendation [Re: robert.d12] #7821036
03/15/23 10:06 AM
03/15/23 10:06 AM
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Wright Brothers Offline
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All mine (non-AT) needed adjusted if large elevation change.
Temp not so much.

Thing that is in my head about auto tune, real or imagined,
is when it gets an air leak, the AT compensates,
it leans out and fries without me catching it before needing top end
and finding leak.

LJ if you are not getting fuel I'd
crack open fill cap, good, it is the vent.
Not, change fuel line, filter, and compare routing to other saw.
No, pressure test carb. No, rebuild carb.





Re: Chainsaw recommendation [Re: robert.d12] #7821043
03/15/23 10:20 AM
03/15/23 10:20 AM
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lumberjack391 Offline
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I never understood vapor lock- the saw starts out fine, Then vapor lock hits and it bogs to the point it wont run. I crack open the fuel cap and the gas is boiling. It would run just fine in cooler weather. After about a half hour it would run fine until it vapor locked again,

Re: Chainsaw recommendation [Re: robert.d12] #7821050
03/15/23 10:28 AM
03/15/23 10:28 AM
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Posts: 4,421
Yukon
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yukon254 Offline
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yukon254  Offline
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Yukon
Other than Echo is there any professional grade saws that dont have the electronic junk ? I've never had an engine on a saw go until now...


do unto others as you would have them do unto you

www.grizzlycreeklodge.com
Re: Chainsaw recommendation [Re: robert.d12] #7821051
03/15/23 10:32 AM
03/15/23 10:32 AM
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Wright Brothers Offline
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Boiling gasoline, YIKES that can't be good.
Never seen that one.





Re: Chainsaw recommendation [Re: robert.d12] #7821065
03/15/23 10:53 AM
03/15/23 10:53 AM
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lumberjack391 Offline
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Well.......bubbling.......looked like it was boiling.

Re: Chainsaw recommendation [Re: lumberjack391] #7821083
03/15/23 11:17 AM
03/15/23 11:17 AM
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Green County Wisconsin
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GREENCOUNTYPETE Offline
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Originally Posted by lumberjack391
I never understood vapor lock- the saw starts out fine, Then vapor lock hits and it bogs to the point it wont run. I crack open the fuel cap and the gas is boiling. It would run just fine in cooler weather. After about a half hour it would run fine until it vapor locked again,


water boils in a vacuum



if you pull the vacuum on the tank fast enough you could boil the fuel it would likely stop almost immediately when you open it


America only has one issue, we have a Responsibility crisis and everything else stems from it.
Re: Chainsaw recommendation [Re: lumberjack391] #7821187
03/15/23 01:45 PM
03/15/23 01:45 PM
Joined: Jun 2007
Posts: 16,150
Tennessee
Scuba1 Offline
"color blind Kraut"
Scuba1  Offline
"color blind Kraut"

Joined: Jun 2007
Posts: 16,150
Tennessee
Originally Posted by lumberjack391
I never understood vapor lock- the saw starts out fine, Then vapor lock hits and it bogs to the point it wont run. I crack open the fuel cap and the gas is boiling. It would run just fine in cooler weather. After about a half hour it would run fine until it vapor locked again,


If it happens like that you more than likely have a blocked vent in the fuel cap. What happens is, that as the fuel gets pumped out of the tank and no air gets in, the pressure in the tank drops. if the temps are high enough outside as the temp drops the fuel will start to boil to the point where the fuel pump in the carb just gets " fuel stem " and quits. Open the cap, let air in and the fuel will stop boiling in a matter of seconds. Rinse and repeat ..... unblock the air vent and it should run just fine.

As pressure drops , liquids begin to boil at lower temps. Thats why you can't cook a potato on Mt Everest without a pressure cooker. The water will boil before it gets hot enough to cook that spud. Simple Physics


Let's go Brandon

"Shall not comply" with morons who don't understand "shall not infringe."
Re: Chainsaw recommendation [Re: robert.d12] #7821188
03/15/23 01:46 PM
03/15/23 01:46 PM
Joined: Jun 2007
Posts: 16,150
Tennessee
Scuba1 Offline
"color blind Kraut"
Scuba1  Offline
"color blind Kraut"

Joined: Jun 2007
Posts: 16,150
Tennessee
Pete beat me to it , proving that you can copy and paste quicker than actually write BS grin


Let's go Brandon

"Shall not comply" with morons who don't understand "shall not infringe."
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