O K Guys, Solve this one! - Snowblower Forum : Snow Blower Forums
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post #1 of 39 Old 01-15-2020, 07:25 PM Thread Starter
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O K Guys, Solve this one!

Older John Deer electric start (35 years or so, mine since new). Starts fine, runs fine as long as the gas tank drain valve is a little open . Shut valve and machine will not start. Open valve starts right up...shut valve it dies within s minute.
I am really not good a fixing things...forums like this one are my only hope. This issue has me really confused.
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post #2 of 39 Old 01-15-2020, 07:36 PM
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Garage
Check the vent hole on the gas cap, it's probably plugged.
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post #3 of 39 Old 01-15-2020, 07:54 PM Thread Starter
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Originally Posted by TooTall999 View Post
Check the vent hole on the gas cap, it's probably plugged.
I did check the cap, "appears OK". Also tried running machine with cap completely off. Had exactly the same issues. Really don't understand how the open gas tank drain valve comes into play.(huh) I would just ignore it, because other wise the machine works fine but the blower goes through a "lot" of gas with the value open.
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post #4 of 39 Old 01-15-2020, 09:05 PM
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is the "drain valve" actually the normal fuel shut-off valve?? ie - it should be open to run. Any pictures of the valve in question?

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post #5 of 39 Old 01-15-2020, 09:49 PM
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Quote:
Originally Posted by paulm12 View Post
is the "drain valve" actually the normal fuel shut-off valve?? ie - it should be open to run. Any pictures of the valve in question?
This was my thought too. I'm not sure what a tank drain valve is. I personally haven't seen a machine with just a drain from the tank, like onto the ground, but of course that doesn't mean they don't exist.

It being a fuel shut-off valve would at least be fairly consistent with the symptoms.

A picture of the valve, and the fuel line that goes to the carb, would help.

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post #6 of 39 Old 01-15-2020, 09:59 PM
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As they say, a picture is worth a thousand words.

I have never seen a snowblower, from any year, with a separate drain. Even if it did, there is no line going to a drain, unless you are referring to a tank shut-off valve, with the line going to the carburetor.
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post #7 of 39 Old 01-15-2020, 10:40 PM Thread Starter
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Thanks for the imput. It would sure "explain completely", the issues I discribed. I've never used it as a drain,always just run unit out of gas in the spring. If a shut off value can go bad ( 35 years old)sure would explain why gas flows out when it is open I will take a picture in the morning, but I think you guys have it. Did I mention I am not good at fixing stuff. Normally just send it off to the professionals,but it is snowing and would not get the blower back for weeks. Thanks again, your help is apreciated
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post #8 of 39 Old 01-16-2020, 02:36 AM
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The fuel valve could have gone bad, or clogged up. They usually had a little strainer screen on the end of them where it goes into the tank and they can become clogged, the vavle could be clogged or the metal pitted so bad that it will no longer allow enough fuel to flow through fast enough to supply the engine with the amount needed.
You could also have a bad fuel line that is swollen internally and is blocking the fuel flow to the carburetor.
Another thing could be is when you think you have it opened, it is actually closed, I've seen that happen many times.
Some of the old engines did have a drain plug on the bottom of the metal fuel tanks, and some people did install a small valve into the tank where the plug was installed.
The gas valves can go bad, especially being it is an older model with a metal fuel tank, and can be clogged with debris like rust, sometimes they just need to be back flushed with solvent and air pressure to clean them, but the rubber gasket seal also goes bad and can either cause a leak at the valve, or a clog of the fuel flow.
Now then by reading the original post, it should stall out after a short time with the fuel valve in the off position, and run again with the fuel valve turned on. That is what it is supposed to do, in that case, there is nothing wrong with it.

Last edited by ST1100A; 01-16-2020 at 02:40 AM.
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post #9 of 39 Old 01-16-2020, 02:48 AM
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If this is one of the older brass shutoffs (metal body, round knob - common on older Tecs and likely others), there is an O ring in the valve that can die and cause it to basically pee when open. If that's the case, either replace it with a new plastic valve, or if you like the metal one, replace the O ring.
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post #10 of 39 Old 01-16-2020, 02:50 AM
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Building on ST's suggestions, Maybe the Bowl is full of Water?? Opening the drain allows enough fresh fuel in to fire off...
Unless the bowl is pulled and drained, that water will continue to collect.


GLuck, Jay
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