Question about Briggs & Stratton Briggs Stratton Intek V - Twin Vertical Ohv Engine with Electric Start 22 Hp, 1" X 3 5/32" Shaft, ModelNo. 44K777 - 0027 - E1

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Briggs and Stratton (Quantum 35) Mower Engine stalls

My Mountfield rotary mower is about 10 years old. It has been regularly serviced. Recently, it starts OK but when hot "hunts" (i.e. the engine speed changes at constant throttle and it lacks power). Eventually it just stalls with a "pop" from the exhaust. I have replaced the plug, checked the carb jets and float chamber and adjusted the mixture. I haven't yet de-coked it or checked (if there is one) the governor. Any ideas greatly appreciated.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

rockitman187
  • 2559 Answers

SOURCE: Honda IZY engine hunts. I mean the speed pulses rhythmically!

Just adjust the idle speed control/Fuel air screw located pointing downward on the bowl of the carb,Just start the engine,idle up high and turn the screw until it levels out and runs smooth.

Posted on Jun 03, 2009

  • 154 Answers

SOURCE: Honda IZY engine hunts. I mean the speed pulses rhythmically!

sounds like air leaking into the intake.replace the gasket that is in between the carb and the block

Posted on Jun 13, 2009

mowerman1857
  • 389 Answers

SOURCE: Briggs and Stratton 22hp v twin OHV smoking badly

First thing to do is pull your dipstick and check for broken or missing O-ring also as you pull it, look to make certain that it was seated properly and all the way locked. If either condition exists, you will be leaking into the crankcase which will cause your symptoms

Posted on Sep 14, 2009

  • 152 Answers

SOURCE: oil appearing at exhaust, smokey, briggs and stratton lawm mower.

You will need to replace or clean the air filter, and probably the spark plug. Do not operate the mower for some hours to allow the oil drain (inside the engine). Check oil level and fill it if necessary. Some oil remaining in the exhaust should be burnt next time the lawnmower operates.You will see smoke at the beginning, that will be normal (burnt oil). Hope this helps!

Posted on May 25, 2010

  • 10865 Answers

SOURCE: i have a problem keeping a 16 horse power briggs

hi Scott. The problem you are having is not due to the screw settings. It is due to a partially gummed up carbeurator. Get a can of carbeurator cleaner and add the recommended amount to the fuel tank. Also get a can of starter fluid and an assistant. While you start it up, have your assistant spray some starter fluid into the air intake area of the engine. Keep spraying the starter fluid until the problem clears and the engine takes off on it's own without any more starter fluid. Joe

Thanks for choosing Fixya!!

Posted on Dec 02, 2010

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Sounds like you will need to clean your carburetor.
Sometimes you can get by with priming it a few times, and letting it
run a few times like that and it will flush the gunk out of the jets,
but most of the time you will need to rebuild the carburetor.
If the mower is over a couple years old, then I also recommend that you
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When you clean your carburetor and remove the jet screws, count the
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Please rate me, Thanks
Good Luck, I hope this helped

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I have a 7 year-old craftsman mower with a 22 HP Briggs engine that has the same issue. After about an hour, the mower acts as if it is starving for fuel and then stalls. Then after about 5 minutes of sitting, it will run for a little while longer.
If your engine is similar to mine, then its carb has a fuel shut off solenoid which shuts off fuel to the Main Jet when Voltage is removed to prevent backfiring when the key is shut off.
Unfortunately, this solenoid can also cause the carb to starve for fuel when not working properly. In my case, when I cleaned the solenoid and the solenoid's connections, the tractor had no problem after that.

Hope that helps,
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