Strong gas smell morning after use - Snowblower Forum : Snow Blower Forums
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post #1 of 12 Old 02-19-2019, 11:06 AM Thread Starter
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Strong gas smell morning after use

Hey everyone! I just picked up a used MTD/Yard Machines snowblower, and after firing it up last night, it smells heavily of gas this morning.


I can try and find the model # when i get home this afternoon, but I uploaded some pictures of it for now.


It doesn't appear to be leaking any gas that i can tell, but maybe i'm not looking in the correct places. I don't know a ton about snowblowers or engines. The person I bought it from said the carburetor and fuel lines have all been replaced.



Thank you for any advice you have!
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post #2 of 12 Old 02-19-2019, 11:19 AM
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Check to make sure the gas cap is on tight? Look to see all the fuel lines are secure and not dripping. Could be the little push valve to drain gas under the carb bowl is stuck in the open position. Or maybe you spilled some gas when you fired it up last night.
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post #3 of 12 Old 02-19-2019, 11:26 AM Thread Starter
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I will check all of those things again.


Do carbs have any kind of "break-in" period or anything like that? Someone i know mentioned it could be because it really hasn't been run at all since the carb and fuel lines were replaced.
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post #4 of 12 Old 02-19-2019, 11:30 AM
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If the machine is dry at the moment (no snow melting from it), I'd take a couple paper towels and put one under the heater box on the left side and one under the gas tank on the right side.

Also, shut off the fuel after running. Say for example that the float bowl is stuck open, or you have a fuel line leak after the tank, shutting off the gas can limit the leaking.

Anyway...leaks can be a "slow drip" type thing...say a drop every 15 minutes. Putting something that can show this is occurring (and where) is how I would approach it.

My blower Bill in my sig/avatar, I rebuilt the carb and installed new fuel line/fittings last February and it ran fantastic. However, it developed a very slow leak come October with a tiny little o-ring on the high speed screw. I didn't catch what machine in my shed was leaking (I had something like 7 gas powered machine in the shed) until I put a paper towel under all the carbs of all the machines.

Came back out the next morning, Bill's towel under the carb was stained from fuel slowly leaking out.

1974 Ariens 922008/922003 "Frankenstein", my dad's 1st new snowblower
1971 Ariens 922002/922003 "The Badger", recent addition, ready for snow
1971 Ariens 922002/922003 "Juneau", finally ready for snow
1971 Ariens 910962/910995 "Bill", SOLD 3/7/2019
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post #5 of 12 Old 02-19-2019, 11:32 AM
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If you don't have a shut off valve under the gas tank, install one. You only need a scissors and a pliers. Though it has a new carburetor does not mean it's functioning correctly. Behind the black box is the carburetor. Look under the carb for fuel wetness. Use a Kleenex to check. It is a very old machine but still should work well. Because it's only a 5hp pushing a 24" width, use high rpms and 1st gear, go slow. You may want to drain the gas to ensure your gas is fresh.

1986 Ariens ST522, 5hp, 22"
1995 Murray Craftsman 10hp, 29" w. 12" impeller
A 1983 Real John Deere 10hp, 32" w. 12" impeller, 16" auger, 20" high front, cast iron gear box, chains
Noma 9hp, 27" w. 12" impeller
Noma 5hp, 24" w. 12" impeller, 20" high front
Gravely Convertible, 12hp Kohler cast iron, 26" width, 600 lbs of cast iron & steel, 2 speed impeller, 4 ground speeds
Dynamark 8hp, 26", 12" impeller, for sale
Several other 5hp, 8hp, several 2 cycle, all for sale
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post #6 of 12 Old 02-19-2019, 11:40 AM Thread Starter
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I will definitely do some more checking for leaks since it is still dry and in the garage at the moment.


Is it safe to run the tank dry and let it sit that way and only fuel it for as much as i need to use it?
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post #7 of 12 Old 02-19-2019, 11:41 AM
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Middle image shows a plastic turn shut-off.

Those have a history of leaking too. Think it was RedOctobyr that was having issues with a bunch of them he bought recently.

1974 Ariens 922008/922003 "Frankenstein", my dad's 1st new snowblower
1971 Ariens 922002/922003 "The Badger", recent addition, ready for snow
1971 Ariens 922002/922003 "Juneau", finally ready for snow
1971 Ariens 910962/910995 "Bill", SOLD 3/7/2019
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post #8 of 12 Old 02-19-2019, 11:42 AM Thread Starter
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Quote:
Originally Posted by tlshawks View Post
Middle image shows a plastic turn shut-off.

Those have a history of leaking too. Think it was RedOctobyr that was having issues with a bunch of them he bought recently.

I will try that and see if that leaks too, thanks!
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post #9 of 12 Old 02-19-2019, 11:57 AM
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Quote:
Originally Posted by tlshawks View Post
Middle image shows a plastic turn shut-off.

Those have a history of leaking too. Think it was RedOctobyr that was having issues with a bunch of them he bought recently.
I saw something but wasn't sure. I went back after your post and enlarged the pic with my finger and clearly saw it. At my age I'm still getting use to this smart phone tablet technology about using your fingers to enlarge things. My desktop still has XP from only a few years ago when someone gave me his used computer and for years I used Win2000.

1986 Ariens ST522, 5hp, 22"
1995 Murray Craftsman 10hp, 29" w. 12" impeller
A 1983 Real John Deere 10hp, 32" w. 12" impeller, 16" auger, 20" high front, cast iron gear box, chains
Noma 9hp, 27" w. 12" impeller
Noma 5hp, 24" w. 12" impeller, 20" high front
Gravely Convertible, 12hp Kohler cast iron, 26" width, 600 lbs of cast iron & steel, 2 speed impeller, 4 ground speeds
Dynamark 8hp, 26", 12" impeller, for sale
Several other 5hp, 8hp, several 2 cycle, all for sale
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post #10 of 12 Old 02-19-2019, 12:47 PM
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Lot of times the gas can is left open and smell up the shed/garage and the blower gets the blame.
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