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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 25685
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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I recently purchased a used Craftsman###-##-####lawn tractor

Customer Question

I recently purchased a used Craftsman###-##-####lawn tractor with Briggs and Stratton 28U707 type 1174-E1 engine. Problem is the engine won't run at any speed lower than half throttle. I replaced the fuel filter, air cleaner, and spark plug. Then I removed the carburetor and took it to a local small engine repair shop. They cleaned the carb and replaced the inlet seat and needle valve. I replaced the carb but still had the same problem. So I took it to a different small engine place that has been in business for over 30 years. In removing the carb a second time I accidently broke the plastic part on the choke shaft. The installed a new choke shaft kit and a new idle mixture screw and cleaned and checked the idle circuit to make sure it was clear. They charged me $83.44 for this service. I reinstalled the carb but still have the same problem. The engine dies when I move the throttle down below the normal mowing speed. I tried adjusting the idle mixture screw and the idle speed screw but no luck. The choke closes fully in the choke position and opens fully in the slow position so I know the cable is adjusted correctly. Can anyone please help?
Submitted: 6 months ago.
Category: Small Engine
Expert:  Curtis B. replied 6 months ago.
Engine will not rev up, or it will not idle?
Expert:  Curtis B. replied 6 months ago.
Expert:  Curtis B. replied 6 months ago.
Is this your carburetor? See the link above. It has an idle screw adjustment, figure 3. Have you tried to adjust?
Expert:  Curtis B. replied 6 months ago.
Did you see my response?

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