Model #636796234 CRAFTSMAN Line Trimmer/Weedwacker/Brushwacker

  • Handle Assembly
    3 Results
  • Crankcase
    3 Results
  • Carburetor
    3 Results
  • Optional Accessories
    3 Results
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Question and Answers

Q:

this unit is running rough at idle... idles a few seconds and shuts off. 636796234 Craftsman Sears brushwacker

A:

Thanks for the inquiry and for being a valued member.

I agree with you're second assumption. I would recommend pulling the carburetor and performing a thorough cleaning on it. It's likely there is an internal blockage that is restricting fuel flow and is causing it to run rough at idle. Once the carburetor is cleaned, and the unit is running smoothly, be sure to mix a fuel additive like Fuel Stabilizer with your fuel. It makes a big difference with this ethanol blended fuel we use today.

I hope this helps and thanks for using SearsPartsDirect.com. We appreciate your business. 

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Jeff Wallace Sr -
Sears Technician
June 14, 2015
Q:

we need a coil for a brush wacker model 636796234, can we still get this part? 636796234

A:

Thank you for choosing Sears Parts Direct. I will be more than happy to help with your trimmer. Upon researching model 636796234; the coil for this unit has been discontinued and is no longer available, we do not have a substitution.

I trust this information will help you, we appreciate your business thank for choosing Sears.

 

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CarlosZ -
Sears Technician
May 27, 2015
Q:

Looking for a manual / gas-oil mix ratio

A:

Finding owner's manuals for older equipment can sometimes be a fruitless search. I was not able to locate one, but I did find a previous expert post that answers the gas/oil mixture. I attached that post below. Hope this helps.

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Barbara H. -
April 28, 2011
A:

Thank You ... Greatly appreciate the quick response!

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Joe Classen -
April 28, 2011
A:

This machine was manufactured for us by Robin several years back. The fuel/oil ratio on your trimmer is 50:1. I am not able to locate a manual for it unfortunately. We don't even have a copy of it here in our library.

I wish I could be of more help to you, but I'm afraid we're just stuck where the manual is concerned. You can go HERE with the model number and see/order parts from the parts images though.

If you have any further questions please let us know.

Thank you for using Manage My Life!

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XX Wade_ -
Sears Technician
April 29, 2011
A:

Interesting because right on my tank it says 16:1 ratio, and what i have been using for years on this machine.

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gpantone3 -
July 13, 2013
A:

Gpantone3: I was not able to find the Owner's Manual of the fuel to oil ratio to confirm. If the gas tank says 16:1, I would use that ratio since you have been using the 16;1 ratio for years.

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Joey S -
Sears Technician
July 15, 2013
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Q:

Fuel shut off valve

A:

I understand how it can be frustrating with the weed wacker not working properly. I have done some research on the Manage My Life website and have located a link quite similar to your issue. While you are waiting for a detailed reply from an expert I have provided the link below. Hope this helps!

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Priscilla V -
June 20, 2012
A:

Hello Rick,

I would like to assist you with your trimmer problem. I have included a diagram showing your valve in the open position, at the end of this post. I am suspicious that this is not the issue though. Usually, an engine that has this type of restriction does not run as long, unless after about 15 minutes or so the valve vibrates to the closed position. I would be suspicious of a cracked fuel line within the tank. If that were the case and the trimmer was filled prior to running, this could happen. As the fuel level dropped, it would get below the crack and air would be sucked in, instead of fuel. Another thing that needs to be verified is the cleanliness of the cooling fins and air movement areas. A two stroke can heat up to the point it will not run and is hard to start until cooled. Be sure to run it at high RPM's too, the engine will not cool correctly if ran slow or idled.

I would also make sure that the carburetor through to the head assembly is tight, with no loose fasteners. I have found several engines that were doing something close to what you are describing and it was due to loose fasteners that allow the engine to leak in air and out pressure at various points, after they had warmed up and the metal started to expand.

Here are some videos, the first one is of a two stroke carburetor rebuild. The second video depicts how to determine fuel line location.

Please let me know what you find and don't hesitate to reply with any further questions that you may have.

Jerry C

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Jerry C -
Sears Technician
June 22, 2012
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Q:

craftsman brushwacker will not run when hot

A:

A trimmer is definitely something we depend on and when it begins to malfunction it can be a huge inconvenience. While you are waiting for an expert to respond, I have attached some helpful links below that may provide information to assist you with your question.

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Barbara H. -
October 09, 2011
A:

The manual for this trimmer is no longer in print and I'm afraid we do not have a digital copy available for download either.

As for the fuel mixture, from what I can tell it should be 50:1. I did read a post from another user here that stated the tank on his machine said 16:1. It looks like this is one of the models that Robin made for us and their machines typically run a 50:1 ratio.

Thank you for using Manage My Life!

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XX Wade_ -
Sears Technician
October 11, 2011
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Q:

Gas/oil mix for Brushwacker 636.796234

A:

The owner's manual is no longer available for this older model. It is likely that this engine uses a standard 40:1 gas/oil mix.

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Lyle W -
Sears Technician
May 01, 2010
A:

I have this exact model and on the plastic gas tank it says 16:1, although 2 cycle oils may be better now.

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Anonymous -
August 19, 2011
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Q:

Looking for replacement Brush Blade for gas brushwacker

A:

That's great to hear that you are wanting to change the Brush Blade on your own. Down bellow i have placed your model number and the website has placed the parts for your specific item. You can order it straight from the web or speck with someone in that department.

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celene -
April 15, 2011
A:

The brush blade (as I am sure You know) is no longer available for ordering from Sears.

I found a blade on the internet at http://www.ereplacementparts.com/1034-brush-blade-p-275531.html. You can order the blade at this site.

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Jimmy K -
Sears Technician
April 18, 2011
A:

I did find that Sears no longer has the blade, but when I went to the above web sdite, the page didn't come up. I went to the ereplacementparts home page, but they didn't find any of those numbers. Do you have a Blade part # ? I am desperate to find a 10 in. replacement blade with 1in. center hole for mounting. Thank you newbie

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Alfred Rye -
April 18, 2011
A:

The part number for the 10 inch brush blade for your trimmer is 952701547. The original part number was NB04D-8101/1A. The original number was superseded by the current number. I thought you might find someone that has the original part number in stock. The web site I went to is http://www.ereplacementparts.com/1034-brush-blade-p-275531.html. I tried it again and it comes up for me.

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Jimmy K -
Sears Technician
April 19, 2011
A:

Thanks for the info, and I did get that page to display, but they no longer carry that part. I even called them. There has to be somepalce that makes that blade, I'll just have to keep looking. It is so great to cut brush and small trees up to 4in.

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Alfred Rye -
April 19, 2011
A:

I am sorry the website didn't work out. I suggest you try some local small engine repair shops. You might find one that has a blade in stock.

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Jimmy K -
Sears Technician
April 21, 2011
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Q:

My sears bushwacker Mod.636.796234 was running & slowed to idle & won't accelerate. Replaced carburetor, no help. Starts fine, won't accelerate, no hi speed adj

A:

I understand your concern on your bushwhacker not accelerating. While you are waiting for an expert answer, I did find a link where you can pull up your owners manual to find instructions on how to set the speed on your appliance. I hope this helps!

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Joseph P. -
August 26, 2010
A:

Have you checked the spark arrestor in the muffler? This screen gets clogged with carbon, creating too much back pressure for high idle. Try cleaning it with a torch. Part #41 in the diagram.

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madgolfer -
August 26, 2010
A:

I don’t thing the ignition module will be the cause of your issue. It really sounds like we’re leaking air from somewhere or that the exhaust is plugged up. If there is a “spark arrestor” screen that can become plugged with soot and cause the machine to act as if the compression is bad as well as a host of other symptoms. More than that it really does sound like an air leak. Check everything over to make sure there are no blown out gaskets of loose parts.

It could very well be a compression problem. If you have way to check it, I would. It should be right around the vicinity of 85-100psi compression.

Thank you for using Manage My Life!

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XX Wade_ -
Sears Technician
August 27, 2010
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Q:

Where can I find the correct part for my line trimmer?

A:

The BRACKET is the part you want. That is actually the part that holds the 2 shafts and has the wing nut. The Balancer attaches to the bracket, but does not have the wing nut and spring on it.

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XX Wade_ -
Sears Technician
May 07, 2009