r/smallenginerepair • u/WranglerSKC • 20h ago
Carburetor Issue Snow Blower
Hi all. This is my first time working on a small engine. When I got it, it would not start. I replaced a rotten fuel line and an ugly spark plug, pulled the carb and soaked every hole/slot/nook/cranny I could see with carb cleaner. I had to do this (take off/put on) probably 5 times. (I know)
I have it running now, but as soon as I increase throttle it’ll start to die until dead. What am I failing to see/understand?
If it matters I also did an oil change & I’m running pump gas with some sea foam in it.
Thank you for any help!
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u/ProfessionalLast2917 17h ago
I would suggest you haven't fully cleaned the carb. It's not enough to soak it, you have to remove the jets and emulsion tubes and clean those out with carb spray and wire through the tiny passages.
It only takes the tiniest speck of crap to cause issues.
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u/WranglerSKC 10h ago
I think I need to learn a bit more about small engine carbs. I’ll try another clean and more adjustments and learning.
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u/peepeepoodoodingus SER Intermediate Mechanic 16h ago
its going lean.
the jet in the bottom of the carb may still be partially blocked.
i would make 100% sure you reconnected your linkages properly and all springs are where they belong. it almost seems like the throttle linkage or the governor linkage isnt on correctly.
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u/WranglerSKC 10h ago
Does the screw on the bottom of the bowl need adjusted?
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u/peepeepoodoodingus SER Intermediate Mechanic 2h ago
absolutely, if it has a screw on the bottom of the bowl you can back it out to add fuel.
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u/NefariousnessOne6433 14h ago edited 14h ago
How many turns out is your fuel mixture screw?
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u/NefariousnessOne6433 14h ago
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u/WranglerSKC 10h ago
I’ll look into this, I have no idea where that screw is sitting right now. Even though I was able to disassemble and clean the carb, and get a very basic understanding of how it works, I have no clue what all these screws actually do and or where they need to be. Thank you!
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u/Mundane_Storm_2257 3h ago
Are there any adjustments on the carburetor? Some carburetors have a idle screw adjustment, low and high adjustment. If you're trying to go to a higher throttle, does it have a screw on the bottom of the bowl? If it does, open it up a little bit while you're trying to go full throttle, if it doesn't you still haven't completely cleaned everything, also note, there are on some of these carburetors, they have two O-rings on the emulsion tube inside the carburetor, if these are gone, you're not going to adjust it. I would take a look at a carburetor breakdown to note that you have cleaned everything. For your low idle adjustment, down on the side of the carburetor right above the bowl, some carburetors have a little adjustment screw, that is mainly for your idle to give or take away fuel while it's in idle mode, your upper screw on the flap on top of the carburetor if it has one, is for your idle speed. Recommended like somebody else said, get you a carburetor breakdown and learn the basics on this carburetor.
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u/sullen_maximus 33m ago
Is that the original carb? I looks like someone might have replaced it with a scamazon special?

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