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Small Engines (Lawn Mowers, etc.)/B&S Carb on a Craftsman Rider


Sir:  I have a Craftsman riding mower model LT1000 with a B&S carb 17.5 HP OHV.
Symptoms: starts and runs OK for 10 minutes then misses, sputters, backfires, stalls. Will restart and repeat.
Will run at idle for another while, but when under load, like engaging blade, it immediately stalls.
Have replaced plug, replaced gas with fresh, run with gas cap removed, and get same results.  I noticed that the gasket on the gas cap must have deteriorated and some pieces fell into the bottom of the gas tank.  I got the large piece out but small pieces are still at bottom of gas tank..  Have also removed solenoid and wire connection under carburetor and let drain.  Did not remove bowl or tamper with float or carburetor.  Tried a little carb spray in air hole on top of carb and it did run smoothly for a short period and the engine did rev up for a few minutes but after a few squirts of the carb cleaner spray the process occurred again; sputter, sputter, slow speed, backfire, stall.  Do you think I should remove the carburetor and clean it ?

I would start by cleaning the carburetor, the fuel tank, fuel line and fuel filter.

You need to make sure there are no obstructions blocking any of the carburetor orifices.

Have you checked You Tube for videos on cleaning lawn mower carburetors?


Small Engines (Lawn Mowers, etc.)

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Eric A. Jones


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.


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.

MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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