Author Topic: fuel lines  (Read 605 times)

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Offline Peter Davies

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fuel lines
« on: February 19, 2013, 09:59:52 am »
I have just replaced the fuel lines in our old Jonsereds 111s; used plastic hose (green in this case) instead of the original black rubber(?) ones. This plastic hose is much stiffer and caused a problem; it would not allow the filter to fall into the gas when the saw was on its side for felling! The solution has been to use a longer length of hose, soak it in hot water and wind it into a "pig tail". This does allow the filter to follow the gas.

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Offline Al Smith

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Re: fuel lines
« Reply #1 on: February 19, 2013, 10:12:14 am »
If you use most plastic tubing which is not actual fuel line it will work but shortly becomes stiff as a board .I've done it myself but it's not the best plan .

I fiddley farted around with Tygon which is fuel line on a 2100 Husqvarna .After I set the damned thing on fire from using stiff plastic .It worked but I finally gave up ,ponyed up the 20 bucks for an original molded line which I should done to begin with rather than play my usual tight wad self . I spent more time trying to save a buck than it was worth .

If you can find the correct sized buna-n type fuel line I think it would work better than platic fuel line.It will stay limber .

Offline aclarke

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Re: fuel lines
« Reply #2 on: February 19, 2013, 01:29:54 pm »
The vinyl tubing sucks. Takes a set and causes issues.   As Al said Tygon works but the reg Buna-n is hard to beat for gasoline

Offline Al Smith

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Re: fuel lines
« Reply #3 on: February 19, 2013, 02:48:29 pm »
I've never had much luck in finding small enough lines to use on a chainsaw .I have used a hodge podge collection of old vacuum lines I saved off of junked out cars .I can't tell buna from rubber .The only way I ever knew if it would hold up it wqs to toss a chunk in a can of gas for couple of days .If it was buna n it would be okay ,if not if it became mush .

I'm sure you could probabley find it if you wanted to spend a couple hours in google land .

Offline Peter Davies

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Re: fuel lines
« Reply #4 on: February 19, 2013, 07:54:15 pm »
Thanks guys! The green plastic tube is sold as fuel line by my local agricultural equipment supplier. I would agree that the black buna-n would be best. It is designed to withstand the aromatics in gasolene. I think that finding the right size is the problem. This plastic stuff has changed color (gone pale) in less than a week and swelled by over 10% That means that the fittings I struggled to fit, just about fell off the line!

Offline dynodave

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Re: fuel lines
« Reply #5 on: March 01, 2013, 03:38:27 pm »
Tygon is a generic family of plastics. The only tygon I use is formula 4040. It is specifically fuel resistant line. I get it 10 feet at a time from McMaster Carr. I understand there is a second formula, but I'm not familiar with it. I have 3 sizes for motorcycles, OPE like garden tractors, and 2 sizes for chainsaws. Holds up well to E-10.
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Offline 660magnum

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Re: fuel lines
« Reply #6 on: March 01, 2013, 04:22:04 pm »
For several years I have just been going up to the local surplus store  (it's a large place and we call it the "Mall") and buying Tygon in what ever size I needed. I keep it on hand for when ever I need it. I have never had any trouble with this Tygon unless it was several years old. After reading your post, I got a piece out and found the number . . .  It is Tygon F-4040 just like you said.

There's a couple other members of this site that live close to me that get their Tygon at the same place.

I notice that the hardware store down the street carries clear vinyl tubing in the usual sizes but I have never used it for I figured it would get stiff quickly?
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Offline Cut4fun .

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Re: fuel lines
« Reply #7 on: March 01, 2013, 04:29:36 pm »
Jim that dolmar echo dealer we both know put some kind of very (cant come up with choice word) grey fuel line in a poulan I worked on. Wrong size and all but it was very bendable and slick actually ( slide off easy and fuel filter slipped out easily too) etc.  I told the owner of saw I left it in and made the ends fit tight so I could see what this grey line did with ethanol gas.


Offline Cut4fun .

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Re: fuel lines
« Reply #8 on: March 01, 2013, 04:32:28 pm »

I notice that the hardware store down the street carries clear vinyl tubing in the usual sizes but I have never used it for I figured it would get stiff quickly?

I tried that stuff when I 1st started repairing saws etc.  Lasted about 1 year or less and had to go through and redo all the saws I did with the clear vinyl crap. Got stiff as a board.

Offline 660magnum

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Re: fuel lines
« Reply #9 on: March 01, 2013, 04:53:42 pm »
You will find that the gray is Viton but what I've seen from McMaster Carr is a little darker in color.
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