If you mean a mixed gas and oil, it may not hurt the mower, it may smoke until this mix is used up. Some mower tanks are easily removed and you can drain the mixture before you use it.
My weed eater lawn mower was expose to the wet weather and now it not staying on
The manufacturers instructions should include the blade size for your weed eater lawn mower.
10w30
How to replace springs on a carberater for a 22 in aweedeater lawnmower
bla bla bla
first thing take the mower to the dump. secondly, push mower into the dump. third, leave the mower there.
1. tipped on the muffler side or 2. blown engine
What type oil
www.freesound.org has some of what your looking for.
clean the air filter air is being restricted
You can get them at any mower shop. Most Lowes and Home Depot stores will carry them also. You just need to know what engine is in the mower.
http://userguides.50webs.com This site carries almost every manual on lawn tools known to man. If they don't have it on their database they will search for it .