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About Eric A. Jones
Expertise
Lawnmower Repair . Certified Master Service Technician from B&S. Have 13 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. I received a scholarship from the Air Force and am currently pursuing another degree.
 
   

You are here:  Experts > Home/Garden > Home Appliances > Small Engines (Lawn Mowers, etc.) > carburetor trouble

Small Engines (Lawn Mowers, etc.) - carburetor trouble


Expert: Eric A. Jones - 5/6/2006

Question
I just installed a carburetor kit in a B&S 12 hp ovh
engine.
143 41602  Serial No. 1081D  Craftman Riding Lawn Mover, Model No. 917.249401  Serial No. 0701S70568

NO.1   When trottle is in idle position and the engine is idling, I pushed the trottle to fast position, the engine will not increase its rpms.

NO.2  If I adjust the carburetor to run fast, and put the trottle in idle position,the engine will not idle down.

No.3  If the engine is running a high rpm, the engine will slowly increase its rpms, and the govenor will open and the engine will run at a real high rpm, the govenor will then shut down, it then will repeat this process over and over.
Thanks for your help,
Very Truly yours,
Frank Rose

Answer
Did you mess with the governor arm screw when you rebuilt the carb?

Is the governor rod binding?  Are there any adjustment needles on your carb...some carbs do not have any.

Did you blow compressed air through the carb orfices when you rebuilt it?
Was there debris in the carb?
Let me know.
Eric

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