More than likely it is a bad ignition coil.
Your mower has an electric PTO clutch that is worn out. It clutch stops working when it gets hot. Replace the PTO clutch and you should be fine. Expect to pay about $150 for the part.
It may be set to run too richly, or perhaps it's trying to "vapor lock". Have the engine tuned up by a professional to start with, then see if the problem still occurs.
It cuts the lawn/ grass when it gets long
It slows and then stops.
If its a push lawn mower. It has no oil release. The mower burns the oil. All you do is replace the oil when it gets low.
Yes, well if it gets blunt... Why shouldn't you?
because it gets teird
It gets a free cleanup when ever it stops
it gets dried up by the sun
push mower- generally 2 on the carb/throttle. 1 by the brake that's gets pulled when depressing the bail to allow the blade to turn. Self prop mower- same as above and 1-2 springs to operate the transmission.
it gets to be 10-12 feet then it stops growing
deal with it until the pain stops