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Chain saw gas lines

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D. McCoy

03-26-2001 16:23:19




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Recently, after storage I tried to use my chainsaw. No Start? Thinking fuel filter was plugged, I removed the filter and line, only to find all hoses were like jelly. Had to replace all lines. Now I would like to know why? Saw was only 3 years old and was properly stored. I dont want a repeat performance of this for sure. Thanks.




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Mike

03-25-2004 13:02:39




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 Re: chain saw gas lines in reply to D. McCoy, 03-26-2001 16:23:19  
Yours is a problem which if fixed for good would run me out of business.I've been a small engine mechanic 4 30 yrs.

But the answer is that over a realetive short amount of time gas eats up plastic.To store drain fuel,crank an run till it stops,blow fuel filter out,and put 1/4 te-spoon moter oil in cylinder.



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JK-NY

03-30-2001 05:57:01




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 Re: chain saw gas lines in reply to D. McCoy, 03-26-2001 16:23:19  

I just had to do the same repair to a 21 yr old echo saw- the line had become soft and actually stuck together cuttting off gas flow. I've never used fuel stabilizers, if the saw is going to sit for a while unused (over the summer) I drain the tank and run it out of gas. I replaced the line with the heavy thickness clear line used for snowmobile gas line.



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John in MA

03-27-2001 19:21:35




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 Re: chain saw gas lines in reply to D. McCoy, 03-26-2001 16:23:19  
I've experienced the same type of problems in the past. The first time I saw it, it was in an old Echo weedeater. The second time was in a Toro weedeater that used the exact same engine as the Echo. The next time I saw it was in my Homelite XL-98 demo saw that I bought. That's really strange to me because I have a Homelite Super XL-924 that I've never had problems with--and it shares the exact same motor as the demo saw. All of the fuel lines were black (Neoprene?) rubber, not Tygon tube.

It may have been the gas, but it's still a mystery.

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Jeff

03-28-2001 07:37:45




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 Re: Re: chain saw gas lines in reply to John in MA, 03-27-2001 19:21:35  
Same problem as with the Tygon. Johnson, Evinrude outboards used a black tube inside some small outboards that exhibited some of the same deterioration. That's why most use Tygon. The problem with most of the black tubing comes from the alcohol content in the fuel. I don't know what the black tube is made of but will find out.



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Jeff (SC)

03-27-2001 12:17:40




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 Re: chain saw gas lines in reply to D. McCoy, 03-26-2001 16:23:19  
Most of the hoses are a type of Tygon tubing. Some have had problems with deterioration. The alcohol used in some fuel stabilizers will attack the material as will age and heat. Some of the newer Tygon is not as suspectable to this. Mercury Outboards even has experienced some of this problem with oil lines made of Tygon. If it is some of the "bad" Tygon nothing you can do about it. I would suggest calling the saw's customer service and DEMANDING (politely) they replace the hose. They know there has been a problem but figure who cares about a $.50 piece of tubing and blame it all on the fuel or stabilizer. Hope this helps.

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Nathan(GA)

03-26-2001 20:40:45




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 Re: chain saw gas lines in reply to D. McCoy, 03-26-2001 16:23:19  
I had the same problem with a John Deere(echo I think) saw. It's line was like jelly. The saw was left with gas in for some time and not used.

I have a Homelite that is 20+ years old and never had a problem with the line on it. It always has gas in it, but is used more.

Can't answer why.



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Ray M41

03-26-2001 19:38:26




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 Re: chain saw gas lines in reply to D. McCoy, 03-26-2001 16:23:19  
I have a 15 year old McCoullough and a 5 year old Weedeater. Both are used normally. I always put them up cleaned and dry. The McCollough continues to run with no problems. I replaced the fuel line on the Weedeater twice.????? ?? It just got hard and broke.
The fuel line on the McCollough is not exposed to daylight while the one on the Weedeater is. Can't say that is the reason.
Saw a fellow at a gathering the other day trying to start a chain saw. Turns out the fuel line had hardened and disintegrated into a hundred pieces.

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F14

03-26-2001 16:57:32




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 Re: chain saw gas lines in reply to D. McCoy, 03-26-2001 16:23:19  
That's pretty weird. I've got a saw that's 12 years old, never had that problem, store it with gas in it and everything. Musta been defective material in the lines.

What kind of saw?



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Mac

03-26-2001 19:26:54




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 Re: Re: chain saw gas lines in reply to F14, 03-26-2001 16:57:32  
F14 Mccoulagh (sp) Been thinking a lot on this. Think I had a small amount of sta-bil in mixture for storage. Also a guy told me if the gas contained ethanol that might have caused it. #1 son has a stihl think it is about 12-14 years old. Has done nothing to his. Saw was relatively cheap, 140 bucks. Maybe thats the problem, but only use it for small stuff. Thanks



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Ray,IN

03-26-2001 19:37:49




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 Re: Re: Re: chain saw gas lines in reply to Mac, 03-26-2001 19:26:54  
I'd say ethanol in the gas did it. Most engine mfgrs. tell you to avoid it. The seals,hoses etc. will deteriorate when in extended contact. Ethanol is in most gas system cleaners, too much will harm more than help. I follow the ratio close as I can.



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