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QUESTION: Hi,

I have a craftsman 5/23 snow blower model C950 52475, that pours out fuel from carburetor after it has been running for awhile.  This happens when I stop the engine or it dies.  It is hard to start initially and when I try to get it to start again.  I did pull apart the Carb and cleaned all the sludge off and blew out air through the float bowl needle tube.  After this it still pours out fuel.  Do I need a new Carb or am I missing something?

ANSWER: The most common problem based on the symptoms you described is a bad carburetor inlet needle seat and/or float.

I would start by replacing the inlet needle and seat.

Is one of the links below the service manual for your engine?

http://www.smallenginesuppliers.com/html/engine-specs/tecumseh/Tecumseh_L-Head_E

http://www.smallenginesuppliers.com/html/engine-specs/tecumseh/Tecumseh_4-Cycle_

Eric

---------- FOLLOW-UP ----------

craftsman 5/23
craftsman 5/23  

craftsman 5/23
craftsman 5/23  
QUESTION: Hi Eric,

Thanks for the suggestions.  I will let you know how it went, once the parts get here and put in.

The links you gave me are not mine.  When talking with sears Canada, they gave me an engine model # 143.744112.  If you have the info, that would be great.  Sears also gave a cross reference for the model number to 536.884800; if you have a link to a service manual, that would be totally awesome.  But if not, that is okay.  I am including some picks of my snow blower.

Thanks,

Troy

Answer
The engine is a Tecumseh HS50-67247E.  This is the engine repair manual link:

http://www.smallenginesuppliers.com/html/engine-specs/tecumseh/Tecumseh_L-Head_E

Page 17-22 cover removing and replacing the inlet needle seat...install new seat with grove facing down when you are holding the carb upside down to install the seat.

Leaking gas it very common on Tecumseh engines.  The problem is the carb inlet needle seat and/or float.  

The carb part number is Tecumseh 640084B (replaces 632107)

Inlet needle and seat part number Tecumseh 631021B
Float part number Tecumseh632816  

Carb parts link:

http://www.partstree.com/parts/?lc=tecumseh&mn=640084B-TEC&dn=CASERIES_191640084

Lots of You Tube videos on replacing/cleaning Tecumseh carbs.

Eric

Small Engines (Lawn Mowers, etc.)

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Eric A. Jones

Expertise

Lawnmower Repair . Certified Master Service Technician from B&S. Have 23 years experience on B&S, Lawn Chief, Weed Eater, Echo, Peerless, Wheel Horse, Snapper, Atlas, MTD, McCulloch, Homelite and many other numerous brands. Specialize in electrical repair.

Experience

Born and raised in the midwest. Started tinkering with engines when I was about 14 on my Suzuki RM-80. I began lawn mower repair at a small hardware store. I knew absolutely nothing. I read lots of repair manuals and met an older fellow who taught me many lessons. I continued working on small engines through high school and paid my way through college working on mowers at the same hardware store. Decided to get away from the midwest and mower repair so I joined the Air Force. I repaired air traffic control electronic equipment and ended up in Hawaii where I got a part time job at Small Engine Clinic. I gained a lot of experience from the Small Engine Clinic and had a blast repairing small engines. I then took the Briggs and Stratton Master Service Technician test and earned my MST. I then traveled to Wisconsin where I attended the factory update training seminar and received formal training. Continued working on mowers part time as I completed 20 years of military. Retired from the military on a Friday and continued in the lawn and garden industry the next Monday.

Education/Credentials
MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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