Carb Leaking Gas - Snowblower Forum : Snow Blower Forums
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post #1 of 22 Old 11-08-2016, 06:56 PM Thread Starter
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Carb Leaking Gas

I noticed at the end of last season that the carburetor on my 2011 Ariens Deluxe 24" was seeping gas where the bowl meets the top of the carburetor. So, today I tried to fix it by simply replacing the float bowl gasket (Part 137D in the attached diagram). Unfortunately this didn't work. The dealer told me when I was picking up the gasket that I could simply put some grease on the old gasket and that would seal it, I tried that on the new gasket, and it didn't work. I'm definitely tightening the nut underneath and the rim of the bowl looks good. Why is this still seeping gas?

Carburetor Diagram
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post #2 of 22 Old 11-08-2016, 07:52 PM
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Is the Float Level Adjustable? If Not, It's Time for a Needle and seat-OR-The Float may be bad.
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post #3 of 22 Old 11-08-2016, 08:01 PM
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Not the gasket..sounds like a sticking float..
see:

http://gold.mylargescale.com/scottyc...html#question4

for more detail..

have you been using gas with ethanol in it? that can be a factor..
if so, look to see if there is ethanol-free gas in your area:

Ethanol-free gas stations in the U.S. and Canada

Scot


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post #4 of 22 Old 11-08-2016, 08:21 PM Thread Starter
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Quote:
Originally Posted by sscotsman View Post
Not the gasket..sounds like a sticking float..
see:

The Ariens 1960's and 1970's Sno-Thro info site.

for more detail..

have you been using gas with ethanol in it? that can be a factor..
if so, look to see if there is ethanol-free gas in your area:

Ethanol-free gas stations in the U.S. and Canada

Scot
This is what is driving me so crazy, I take GREAT care of all my equipment. There has never been a drop of gas in that machine that wasn't laced with Seafoam and sometimes even Sta-bil too.

When I changed the float gasket, the float itself looked perfect and didn't appear to stick at all. I have no idea what could be the cause of the leak. I'm no mechanic though, hopefully you guys can figure this out.
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post #5 of 22 Old 11-09-2016, 12:35 AM
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It may be frustating, but no matter how well built a machine is, how well taken care of something is, it is still just a mechanical device. And like any mechanical device, subject to failure, no guarantees or anything The needle may not be sticking, it just may not be closing all the way which lets fuel past it when the engine is shut off, and there you have gas dripping out of the carb, though it may appear it is a gasket issue instead.
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post #6 of 22 Old 11-09-2016, 01:25 PM Thread Starter
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It may be frustating, but no matter how well built a machine is, how well taken care of something is, it is still just a mechanical device. And like any mechanical device, subject to failure, no guarantees or anything The needle may not be sticking, it just may not be closing all the way which lets fuel past it when the engine is shut off, and there you have gas dripping out of the carb, though it may appear it is a gasket issue instead.
The needle looks fine, clean as a whistle. However, maybe it has something to do with the port. Maybe I'll try spraying some carb. cleaner in there to loosen things up a bit??

One question: At the end of the needle there is a wire/metal "hanger" that is placed over the tab on the float. That wire/metal "hanger" has 2 loops, one on the right right and the other on the left. In the middle is what is hung from the tab on the float. Do these 2 loops face in toward the middle of the float, or out toward the outside of the float? Upon inspection, I really don't think it matters because the needle fits nicely inside the port either way.
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post #7 of 22 Old 11-09-2016, 05:19 PM
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Wow.. I've never seen a needle thingie like that before, I'm used to something like this:

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post #8 of 22 Old 11-09-2016, 09:38 PM Thread Starter
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Alright, this might be a stupid question, but is the float valve needle suppose to have a corresponding seat? There isn't one on the diagram, check out my original post, so there might not be. However, and remember I don't know much about carbs., I thought there is suppose to be a seat.
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post #9 of 22 Old 11-09-2016, 10:01 PM
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I have never done it myself, but I have read of people with briggs carbs using valve lapping compound on a Q-tip to polish the brass valve seat and cleaning it well before re-inserting the needle valve. Even a small nick, scratch or corrosion will prevent the needle from sealing against the seat.

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post #10 of 22 Old 11-09-2016, 10:53 PM Thread Starter
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I have never done it myself, but I have read of people with briggs carbs using valve lapping compound on a Q-tip to polish the brass valve seat and cleaning it well before re-inserting the needle valve. Even a small nick, scratch or corrosion will prevent the needle from sealing against the seat.
Thanks, but there is not seat. That's why I'm wondering if there is suppose to be one or not.
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