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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?
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.
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."
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.
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,
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.
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."