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Author Topic: Boiling Gas?  (Read 2484 times)

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Offline chipsfly09

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Boiling Gas?
« on: March 09, 2009, 10:27:16 PM »
A friend of mine changed saw brands because he said that his was boiling the gas-- I have heard of this   never seen or experienced it-- he said he was running the saw hard-- it shut off- he opened the tank to see if it was out of fuel-- looked in and the fuel was "boiling like a wiches cauldron".   I have not researched boiling point of gasoline-oil mix. Perhaps this was due to tank temp. Is it possible that it could have been a result of a vac in the tank-- which should have relieved when the cap was removed-- Perhaps the saw was hot enough to vapor lock ??  Maybe this is common in some saws?  Any thoughts?  May have been discussed here before ad nausium-- forgive me if that is the case-- relatively new here-- Have really enjoyed info here so far.. Don't want to knock a particular saw brand-- that's why I did not give make and model-- It seems that all saws are loved by someone--especially here--I like that!

Thanks

Online Al_Smith

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Re: Boiling Gas?
« Reply #1 on: March 10, 2009, 05:29:13 AM »
 It used to common on the old Homelites .I've never seen it on a modern saw .

Offline mike_van

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Re: Boiling Gas?
« Reply #2 on: March 10, 2009, 05:37:03 AM »
Tearing one apart & really cleaning the fins, etc. of all the oily chips will usually cure overheating.
I was the smartest 16 year old I ever knew.

Offline Ironmower

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Re: Boiling Gas?
« Reply #3 on: March 10, 2009, 05:59:18 AM »
Hey my ole' Homelite super XL would do this. Al Smith is right clean the fins and make sure your not runnin' it to "lean". Careful I got a face full of boilin' mix one time, not very pleasant. :(
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Offline John Mc

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Re: Boiling Gas?
« Reply #4 on: March 10, 2009, 11:22:41 AM »
If your muffler is a catalytic one, switching to a non-catalytic muffler will also help a saw run significantly cooler. It made a big difference on my Jonsered 2152.
If the only tool you have is a hammer, you tend to see every problem as a nail.   - Abraham Maslow

Online Al_Smith

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Re: Boiling Gas?
« Reply #5 on: March 10, 2009, 04:00:57 PM »
 I think it has more to do with the saw design more that anything .

Older horizontal cylinder engines with the tank over the cylinder seemed to be the worst for boiling .

I had an s-25 Poulan  do it once but that was in the Colorado mountains at around 10,000 feet elevation on a deer hunting trip . The saw ran ran fine though after being adjusted for altitude . Didn't miss a beat .


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