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B&S idle problem

Floydyisms's Avatar

Join Date: Nov 2008
Posts: 1

11-13-08, 11:17 AM   #1  
B&S idle problem

I have a 19.5 horse B&s model no. 42E707 on a craftsman mower. It starts fine but will run, idle down to almost stall, run, idle down to almost stall repeatedly, worse when in gear. I have put on a new air filter, and fuel filter but no good, could this simply be old gas? or do I need to dive into the carb??


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marbobj's Avatar

Join Date: May 2006
Posts: 3,658

11-13-08, 06:48 PM   #2  
That surging problem is normally a lean fuel/air mixture = dirty carb. Could be attributed to old gas. Changing the gas would be a good place to start.

tater1800's Avatar

Join Date: Jan 2008
Posts: 86

11-13-08, 07:17 PM   #3  
See the other Briggs thread. I think you both have the same problem.

cheese's Avatar
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Join Date: Jul 2001
Posts: 16,567

11-13-08, 09:39 PM   #4  
Open up the carb, clean it well, remove the main jet and clean it and the area behind it, and your problem should be solved.

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