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Craftsman mower- 247.38903 running sluggish


hgoodwiniii's Avatar
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04-01-16, 11:12 AM   #1  
Craftsman mower- 247.38903 running sluggish

Hi all, I have a Craftsman 21" mower with Engine model #126T02-0795-B1. the engine is running very sluggish and even cuts off. I have changed the air filter but it runs the same with the air filter on or off; I sprayed some carburetor cleaner in the carburetor and it ran somewhat better for a bit. However, if I remove the air filter and air filter housing and force the throttle lid to stay open, the engine runs very strong. I would appreciate any help. Thanks.

 
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04-01-16, 03:00 PM   #2  
By far one of the most common issues is a dirty carb.
Time to pull it off really clean and rebuild it.

 
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04-01-16, 03:30 PM   #3  
I agree.
Use a 1/2" socket to remove the bowl bolt, clean the little holes out in the bolt. Be ready to catch some fuel. You can use a pair of locking pliers to gently pinch off the fuel line if you have no fuel valve. Clean out the bowl and bolt and should be up and going.


Just needs a bigger hammer
Peace

 
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04-03-16, 11:09 AM   #4  
Ok, thanks very much. I'll do it.

 
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04-04-16, 12:24 PM   #5  
Be careful when taking apart the carb as to not damage any parts. Don't tighten screws too tight and make sure to clean every orfice. Take it completely apart. Use a lot of carb spray. I usually use almost a whole can on each carb just to be sure nothing is left. Also if you miss something it can and probably will find a way to clog it again.

 
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04-04-16, 12:45 PM   #6  
I would be checking the throttle linkage and governor. If you can force the engine to run properly, or at higher rpm, by moving the linkage manually, it does not have a fuel flow problem. If the linkage is loose, bent or mis-adjusted, you won't develop full rpm.
You can likely get an owners manual from searspartsdirect or outdoor power distributors, or the engine maker. Briggs & Stratton has all sorts of PDF files of their service manuals available at their site.

 
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04-04-16, 01:42 PM   #7  
Ok tmwalsh, makes sense; I will pull the carb and check out all the linkage connections and so forth around it.

 
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04-04-16, 05:33 PM   #8  
Above the carburetor is a metal tab with a hole in it and a spring hooked to it. It's right under the plastic cover at the front corner of the engine. When you push the mower under bushes and such, this gets bent back a bit, reducing the tension on the spring. Normally you can just bend it back forwards, towards the front of the mower until the engine speed is normal again.


"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

God bless!

 
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04-05-16, 06:00 AM   #9  
Ok, thanks. Wow good suggestion. I will definitely check it.

 
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