Mower sped way up and died. I checked oil, gas, spark plug, and trying to work on governor spring assembly. I don't have a good picture and really think the armature holding the spring got bent. I have a model 12A-979L062-95908, 6.5HP, 21" CUT, self-propelled. Any suggestions?

Patrick, Ensure mower has good gas, good spark plug,Is the blade good and sharp. Clean any dirt, grass etc, form around the carburetor and governor linkages. It is possible the governor on engine may need adjusted, or spring off or a dirty carburetor needing cleaned internally. Check the attached links,instruction and guides, Good luck
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Governor Adjustment and How They Work Honda Briggs Tecumseh Kohler etc
How Small Engine Governors Work any governor setup
honda governor adjustment Google Search

According to Amie Taylor on http://homeguides.sfgate.com/lawnmower-revs-up-down-100220.html "Airflow Issues A lawnmower that hunts and surges may be experiencing something as simple as an airflow issue. If the air that the engine requires to run is blocked, especially sporadically, it can cause the engine to slow down. When the blockage moves or clears, the engine may suddenly rev up in response. To fix this type of problem, check the air filter to ensure that it's not clogged with dirt and debris. Check the vented gas cap as well. Both issues can cause reduced or sporadic air flow, and clearing them will fix the problem.
Spark Plug Problems Another problem that can cause revving and dying of a lawnmower engine is a faulty or poorly adjusted spark plug. Check the spark plug to see if the wire is connected to it firmly and not wobbling about. If it is connected correctly, remove the spark plug to see if it's covered with corrosion. If so, a simple scrubbing with a wire brush can restore it to working order. If necessary, replace the spark plug with a new one. Check the spark plug gap with a spark plug gauge to ensure that it's adjusted to the proper setting recommended in your owner's manual.
Carburetor Adjustment A carburetor that's incorrectly adjusted is a common cause of poor engine idling that results in hunting and surging. Fortunately, most lawnmowers have two screws that allow you to adjust the carburetor yourself. One screw controls the idle speed while the other adjusts the idle mixture. Check the manual if you're unsure of the location of the idle adjustment screws. Start the mower and allow it to run for 5 minutes. Then slowly adjust the screws tighter or looser in turn until the mower runs and idles smoothly.
Fuel Problems A particularly simple fix that can be at the bottom of many lawnmower idling problems is old or contaminated fuel. If the fuel has been left in the mower while it was stored over the winter or while the mower has remained unused, drain it and replace it with fresh fuel. If you have gas-powered blowers and trimmers that use a mixture of 2-cycle oil and gasoline, check to see that you've not placed that mixture in the lawnmower inadvertently."

Usually when a mower dies, it is a fuel delivery problem. Have you changed the filter? Is the gas fresh. Also has the air filter and spark plug been changed recently? the Carburetor may need to cleaned. Take the air cleaner off and spray some carb cleaner in the throat of the carb. Also, take about 1/3 bottle of carb/fuel system cleaner and add it to the gas in the tank.. For the new mower engines, there is no fine-tune adjustments on the carburetor. Also clean the exterior of the carb with carb spray.

If fuel is getting into the oil, I would say the needle and seat or float in carb is not stopping fuel flow. I would check carb again and adjust float level. Change or install an inline fuel filter too. Surging is almost always carb related. If problem persists after checking carb again, check governor springs. If they have been bent at all after removing carb, they can be bad. If you replace new governor springs and surging still exists, try doing a static setting on carb/governor. If your unit has an oil/centrifugal governor, move governor arm in the direction that opens throttle valve in carb all the way, hold in place, loosen nut on governor arm and grab small tang that goes inside engine and turn in the same direction you moved governor arm, rotate this until it stops, hold in place and tighten nut on bottom of governor arm. This is called a static/factory setting. Make sure throttle cable is in high position when doing this. Let me know if you have any questions. Good luck!

I’m happy to assist further over the phone at https://www.6ya.com/expert/layne_0fccff498c319c32

Check the belt/s and make sure they are clear. If they are okay, check the governor spring. If the spring is gone, it will start but as soon as a load is put on it will stall. Good luck...Lee

Ckeck the spark plug cable and make sure it is tight on the plug. You did not say what kind of mower but some have low oil shutdowns. Make sure the oil is up to the full mark. If neither of these items solve the problem check the spark. If there is good spark remove the air cleaner and squirt some gas into the carbburator and try to start. If it runs then dies you know it is a fuel problem.

that's not a choke lever, it's used as a speed control on some models. the two springs are attached to the governor rod, which is attached to an "air vane" governor - on these engines, you need to keep the gas tank fairly full at all times, the dip tube on the carburetor rides up off the bottom of the gas tank, if fuel level goes lower than this tube, it won't pull any gas to the intake - from your descriptions, though, it sounds like the diapragm between the carb and gas tank has "curled". briggs had a service flash on the problem and since it's new, you should take it to a shop that does briggs warranty work - it should be covered under warranty

try holding the throttle open

try empting the feul tank and put fresh feul in with a little dry gas treatment if that dont work try getting some carb cleaner in a spray can start mower and gingerly spay into carb trying not to over flood it keep spraying untill running smooth change CRANKCASE OIL and AIR FILTER.

model # 12f702-1824e1 mower( that uses weedeater string) had a spring come off the carberator and I don't know where to put it back on.