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2171 Leaking Gas

PB

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Last week I noticed my 2171 leaking gas when I filled it up but figured it was pressure in the tank. Then, tonight as I fueled it up again I noticed it leaking again. It is coming from between tank and crank body on the clutch side. Without tearing it apart tonight (firewood tomorrow) can anyone suggest where to look? I am guessing it is the tank vent but I really don't have repair experience with this saw.
 

PB

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My 2171 fuel tank vent has a hose attached to it but the new vents don't. Ny functional difference between the two? One better than the other?
 

TK

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If its leaking its leaking around the vent not through it. Get a new vent. Dry out the tank. Super glue the new vent in. No more leaks. Change the little white puck as necessary every decade.
 

PB

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If its leaking its leaking around the vent not through it. Get a new vent. Dry out the tank. Super glue the new vent in. No more leaks. Change the little white puck as necessary every decade.

No white puck. There is a hose attached to the vent that comes into the carb box. I am going to get a new vent tomorrow at Ware's. They have both styles, is one better than another? So if you super glue it in, what happens if the vent goes bad?
 

TK

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The vent is the white puck, not the black holder. The white puck can be removed and replaced later on. Or you can use the elbow and the fuel line. Either way, seal the black piece to the tank so that won't be a source of a leak - which is usually the case.
 

PB

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Well, I picked up both types of vents this morning. Neither of them want to stay in on their own. Terrible design. I am not quite ready to go the super glue route so I did some searching and found that some AS members had luck with o-rings on the tube. I picked up a few o-rings tonight so I am going to give it a try tomorrow. What about RTV? I just don't like the idea of not being to service the vent in the future if I super glue it in there.
 

jacob j.

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RTV isn't going to resist gas. Automotive "GOOP" works ok if you let it cure well before exposing it to gas. I fixed a 385 vent identical to yours this way.
 

TK

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Goop is essentially a really thick super glue if you look at the ingredients.
 

PB

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It was a good idea with the o-rings but no dice. Oh well. Off to get some Seal All tomorrow to glue that damn tube in. JJ, I looked at that Goop and it says that gasoline will dissolve the automotive stuff.

Why the hell did they design the vent this way? Dumbasses.
 

TK

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I ain't got a problem with mine or most others that I see for service. Must just be yours. I've even seen a bunch the rather float in there and spin without leaking. Did yours still leak after you replaced it or did you not fuel it up?
 

jacob j.

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It was a good idea with the o-rings but no dice. Oh well. Off to get some Seal All tomorrow to glue that damn tube in. JJ, I looked at that Goop and it says that gasoline will dissolve the automotive stuff.

Why the hell did they design the vent this way? Dumbasses.

Interesting- mine has held for over a year now...
 

PB

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I ain't got a problem with mine or most others that I see for service. Must just be yours. I've even seen a bunch the rather float in there and spin without leaking. Did yours still leak after you replaced it or did you not fuel it up?

I didn't fuel it up, but with the hose and white tube I could turn the tank on the side and it would fall out with a tap. I have the black tube and puck in there now. I will try it for a while and see if it leaks. If it does then I will glue it in there.
 

TK

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I didn't fuel it up, but with the hose and white tube I could turn the tank on the side and it would fall out with a tap. I have the black tube and puck in there now. I will try it for a while and see if it leaks. If it does then I will glue it in there.

Did you try to put the elbow in the black tube? I've never tried before.....
 

PB

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Did you try to put the elbow in the black tube? I've never tried before.....

No. The black tube is shorter than the white and I don't think it will be seated properly if the elbow does fit.
 

PB

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Well I think I got it figured out (I know you were all on the edge of your seat). Went with a smaller o-ring and it doesn't leak and the tube is snug. Hopefully it holds up.



P1040215.jpg
 

TK

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Looks like it will work well. There are many ways to skin a cat. I installed a secondary tank vent on a 670. Well, not really for the intentions of having a vent, but it ended up being that in the end. Alls well that ends well :D


Oh and by the way I'm 95% sure ill be at the forestry expo on Saturday. Can't make Friday.
 

PB

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Looks like it will work well. There are many ways to skin a cat. I installed a secondary tank vent on a 670. Well, not really for the intentions of having a vent, but it ended up being that in the end. Alls well that ends well :D


Oh and by the way I'm 95% sure ill be at the forestry expo on Saturday. Can't make Friday.

I have to give props to Rob066 over at that other site for the idea. My only concern is the ethanol eventually degrading the rubber but for .79 I can handle that.


I am also 95% sure that I will be there too. :) Did we just become best friends?
 
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