No, normally weedeater gas has oil mixed in with it. This will gunk up the engine and cause the spark plug to fail.
Turn counterclockwise.
Not really sure what you're getting at. If your lawnmower engine is a 2-stroke then you need a mixture of oil and gas to run it.
If your lawnmower is a 2 stroke mixing oil in the gas is what it needs to run right. If your lawnmower is a 4 stroke mixing oil in the gas fouls the plug and makes it not run.
Poor carburetor adjustment, it's probably running too rich.
cracked gas line, cracked bulb, or weedeater out of gas
Drain the oil and gas out of the crankcase and put oil back it should be OK
Almost all lawn mowers require SAE 30 oil.
Look on the Gas cap of your weedeater. It should tell you the gas to oil ratio. If its not there try looking in the manual or online.
That depends on the model/make of lawnmower, but it will always be on top.
if its regular gas
no get new gas
winterizing a lawnmower is easy. 1: drain all of the fuel from the gas tank, and run the mower until all of the fuel is out of the lines and it stops. if you want to avoid all this, you can simply add fuel stabilizer. 2: drain and clean the floatbowl ( if equipped)