NON TW related mechanical question?
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Thread: NON TW related mechanical question?

  1. #1
    Senior Member Dryden-Tdub's Avatar
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    NON TW related mechanical question?

    Here goes. I have a Sno-Tech snowblower that simply would not start on Sunday even though it was running well on Saturday. After a good 25 minutes of trying to start the darn thing I over heated the starter and had fuel dripping from the exhaust. Lets get the simple things out of the way first. Fuel delivery was good. Spark was VERY good. Here is where I am confused........... Somewhere in my memory bank I remember someone decades ago telling me to try and cover the exhaust while starting. I did this and the snowblower sprang to life. It also ran like a top for three hours straight! Next morning same thing. I fired the starter for a few short bursts then covered the exhaust and boom fired right up. Once it has been running for a few minutes I can pull start it easily.

    What is the problem?





    Tom
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    Senior Member Badgerflorida's Avatar
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    I’ve never had experience with this but I remember reading that it causes enough unburned fuel to accumulate in the combustion chamber. Kinda like it is getting too much air and not enough fuel and covering the exhaust brings it closer to equilibrium. Sorta the opposite of choke? Definitely gonna try that the next time I’m scratching my head with a carb engine that won’t start.
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    Senior Member ssgtrillium's Avatar
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    Sounds like it may have flooded.Do you shut off the fuel when your done with it? When I start mine I pump the primer 5 or 6 times some fuel will leak out the overflow give it full throttle and choke then one very hard pull.Starts every time.
    Maybe your exhaust valve has too much carbon on it and is not seating all the way.
    Last edited by ssgtrillium; 01-22-2019 at 12:25 PM.

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    Senior Member Darth's Avatar
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    Tom -
    Check Post No. 7 here:
    https://www.thetruckersreport.com/tr...starts.188959/

    And Badger's post, above.

    Looks like 2 different theories leading to the same result!
    This was all I could find.

    My recommendation would be to blow-off snow work, build a fire, pop some corn and crack a bottle of fine Bourbon.
    Play some games.
    Or put on some porn...
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    And though a mountain may rise up and smack the livin' shit outta me,
    and wad up my bike somethin' awful...
    Still, I rise!
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    Senior Member elime's Avatar
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    I have never heard of this trick but I do have a power washer that is a bitch to start so I will try this trick the next time I use it.
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  7. #6
    Senior Member Dryden-Tdub's Avatar
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    Quote Originally Posted by Darth View Post
    Tom -
    Check Post No. 7 here:
    https://www.thetruckersreport.com/tr...starts.188959/

    And Badger's post, above.

    Looks like 2 different theories leading to the same result!
    This was all I could find.

    My recommendation would be to blow-off snow work, build a fire, pop some corn and crack a bottle of fine Bourbon.
    Play some games.
    Or put on some porn...
    I found this exact thread prior to posting this! Too funny. I always try to figure this stuff out prior to asking others but that was the ONLY thread I found on these symptoms. Thank you.


    Tom
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  8. #7
    Senior Member Dryden-Tdub's Avatar
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    Quote Originally Posted by ssgtrillium View Post
    Sounds like it may have flooded.Do you shut off the fuel when your done with it? When I start mine I pump the primer 5 or 6 times some fuel will leak out the overflow give it full throttle and choke then one very hard pull.Starts every time.
    Maybe your exhaust valve has too much carbon on it and is not seating all the way.
    I am not good about shutting off the fuel for a simple overnight rest. Long term storage however I do shut it off and run the bowl dry.

    Could this have something to do with the way the motor is set up? It claimed to have some function that made it easier to start in extreme cold temperatures? Not real specific on how they went about accomplishing this goal....... Thank you for your reply!



    Tom
    Darth and Badgerflorida like this.
    It won't be greed which destroys America. It will be envy.

    Man who runs in front of motorcycle gets tired. Man who runs behind motorcycle gets exhausted.

  9. #8
    Super Moderator JerseyJeeper's Avatar
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    It's the modulator valve..
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  10. #9
    Super Moderator JerseyJeeper's Avatar
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    Blocking the exhaust causes some gasoline to build up in the cylinder (for a richer mixture) .

    SECONDLY I've read (but haven't thought through the concept) that if you cover the exhaust tightly it keeps some of the compression in the cylinder from escaping so on the next compression stroke you have a little more compression and a little richer mixture. This equals an easier start usually. Especially if your choke is not functioning correctly. So they say...

    Lots of snow blowers have "auto-chokes" that stick and don't work (choke) fully on cold start. I've seen this at least three times.

    Warm engines need less choke, i.e., a less rich mixture to start.

    My guess is by holding the exhaust your keeping fuel from blowing out of the chamber for a richer mix, just like a properly working chike should do. Check your choke operation.. would be step one I think.
    Husqvarna TE300i Fuel Injected 2-Stroke 2019
    Yamaha XT225 - 1999 Serow
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  11. #10
    Senior Member Darth's Avatar
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    I'm happy to report that I have never actually even seen a snow blower in person...thank God!
    However, I did buy a snow shovel on sale a few years ago and have used it twice.
    Next time it snows enough to matter, I'll just tell Betty that it won't start...something to do with the choke. Or something.
    “It’s more fun to ride a slow bike fast, than a fast bike slow”.

    "The less horsepower a motorcycle has, the more it can teach you.” - Ben Bostrom

    And though a mountain may rise up and smack the livin' shit outta me,
    and wad up my bike somethin' awful...
    Still, I rise!
    (With apologies to Maya Angelou)

    Humans: simultaneously capable of such genius and such douchebaggery!

    "Give a Damn"
    - C. M. Howe, Jr.

    Hidden Content

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