Craftsman 536.918800 carb leaks - Snowblower Forum : Snow Blower Forums
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post #1 of 13 Old 12-26-2015, 01:15 AM Thread Starter
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Craftsman 536.918800 carb leaks

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Hello I have a craftsman 536.918800 it ran (not well) when i got it but now, 2 years later, it wont start. It hasn't snowed hardly at all here in last couple years but now I need it. my problem is that it may need a new carb,? I gave the carb a quick cleaning, but now if i press the primmer a couple times it leakes gas out the side of the carb until it drains the tank. Any help would be great.Thanks
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post #2 of 13 Old 12-26-2015, 01:40 AM
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Good Man.

Quoted form the other:

Problem is you're gonna need more than a 'quick cleaning', what has happened is that your float needle valve is gunked into the open position and not closing when the bowl fills. Thus allowing the tank to drain through that little hole, and maybe into the cylinder too. You need to pull the carb off, disassemble, and do a proper refurb. At least a thorough 'by hand' cleaning, checking to see that all orifices are clear and clean and that the float needle moves freely.

You might want to pull the plug and see if there's gas in there, pull it over a few times. Also check the oil, it may be too full because of gas getting in there as well.

And welcome to SBF.

Addendum portion: It doesn't need a new carb, the one you have needs cleaning. Don't be afraid, take it apart and see. Not hard to do, just be careful.


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post #3 of 13 Old 12-26-2015, 01:50 AM
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Further reference and assistance/information: Small Engine, Lawn Mower, Snowthrower Troubleshooting, Repairs and Safety


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post #4 of 13 Old 12-26-2015, 03:09 PM Thread Starter
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OK so i pulled the carb off again and took it apart. I can't seem to get the jet out, it does not have a slot for a flat head screw driver. also my float has a crack in it, causing the float to fill with fuel. so I assume that could cause the fuel to spill out? Is there a way to repair the float or are floats generic enough to find a replacement for it. So advice on float and jet are what I think I need. Thanks
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post #5 of 13 Old 12-26-2015, 03:12 PM
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Yes you need a new float. I wouldn't waste my time trying to repair a float.

floats are easily purchased from many places for just a few dollars.
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post #6 of 13 Old 12-26-2015, 04:48 PM
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to SBF cliff. If you post the numbers stamped into the top of the recoil shroud right in front of the spark plug, someone will lookup up the correct parts for you. If your machine has electric start, you will have to remove the starter push button to see them. Being a Craftsman product, the numbers will probably start with a 143.xxxxxxx. which is a Tecumseh motor made for Sears.

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post #7 of 13 Old 12-26-2015, 07:11 PM
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That's even better'n it being dirty, easy fix ftw.


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post #8 of 13 Old 12-26-2015, 07:28 PM
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I looked at the Sears .pdf, it looks to be an 8hp Tec snow.
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post #9 of 13 Old 12-27-2015, 12:09 AM Thread Starter
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Thanks to all who replied to my post. I was able to solder the crack in the float and give the carb a better cleaning. Now it no longer dumps fuel out... BUT i cant get it to run without dumping a few drops of fuel directly into the cylinder, then it dies in a couple seconds. Anyone know the screw adjustments ? BTW I am getting a rebuild kit and new float anyway, I just want to get it running so i know i'm not wasting my time.
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post #10 of 13 Old 12-27-2015, 01:39 AM
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So somehow, fuel isn't getting to the cylinder I think. Plug is dry when you pull it?

When you say 'better cleaning' does that mean you completely disassembled it and checked/cleaned all the orfices? Float needle move freely?

Good work btw.

You may also find this video helpful:



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