I have a Toro lawnmower with a 6.75 Briggs & Stratton 190 cc motor on it and it continues to sputter when it is idle. I have changed everything

Paul’s Toro said:
I have a Toro lawnmower with a 6.75 190cc Briggs & Stratton motor on it that continues to sputter when idling. I have changed the oil, the spark plug, the air filter and the carburetor and it still sputters.
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make sure the fuel is clean and new. Run a compression test to see if the valves need adjustment. Also if it has ever had a strike like a tree root, make sure that the flywheel key is not partially sheared. When you say you replaced the carb, did you check the gaskets, use a factory part, and check the intake tube for cracks?
 
sgkent said:
make sure the fuel is clean and new. Run a compression test to see if the valves need adjustment. Also if it has ever had a strike like a tree root, make sure that the flywheel key is not partially sheared. When you say you replaced the carb, did you check the gaskets, use a factory part, and check the intake tube for cracks?
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Brand new fuel and I added Marvel Mystery oil just to see if it would help which it did not. I replaced the carburetor and all the gaskets along with the tube. I am pretty mechanically inclined. This one has me stumped based on the work I’ve done. At this stage of the game. I’m thinking it might be a valve issue. I appreciate all you help.
 
Some carbs won't idle down under 2k rpms.

Having said that, Briggs recommends not to idle down. Lack of oil lubrication and air cooling are the symptoms of. Run her at 3200 to 3600 and call it a day.
 
m 20055 has one speed. You cant idle it. It is either on or off. When one lets the kill handle go the mower dies as designed. I would think the 20056 would do the same. If the rpm won't come up then something may be goofy with the governor circuit as others have suggested.
 
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