These are called fairy rings, which are primarily caused by a fungi.
No but lots of water is the best!
To clean the air that is to be mixed with fuel in the carburetor.dirty air can cause cylinder to score, the rings will wear causing loss of compression,and oil. this will lead to loss in performance.
If the water gets into the cylinder head, it could create rust on the valves, cylinder liner(s), piston(s) and piston rings, causing the engine to "lock up".
bad piston rings
To replace the piston rings, you will nee to use a ring compressor tool or two pliers to remove the old rings. Place on the new rings, and scatter the gaps in the rings. Apply some engine oil to the rings so they are easier to get in place.
If by lawn rings you mean the spaces between your rows while lawnmowing, one of the best things you can do instead of hunting around and re-mowing these, you can do a different mowing pattern. One I use that doesn't leave a lot of lawn rings is to go around the yard a few times to get grass off the edge, circle any trees in the yard several times, then do a diagonal mowing pattern from one corner of the lawn to the other. Every other week, I mow from a different corner to the corner opposite, so that I don't leave any deep mower tracks that interfere with cutting the grass. Hope this helps you fix your lawn rings.
No. It is made up of asteroids and other space matter.
Only after peeing on it The urine reacts with the chamicals of the rings causing it to be like a water slide Bagpipes lol
It could be that the mower was tilted on its side or that the rings are bad.
If the lawn mower is run without oil, the connecting rod bearing will heat and score, or even "weld" to the crankshaft, causing major damage.
It depends, as many different types of mushrooms can grow on ones lawn. They may be lethal, poisonous (causing nausea, vomiting, etc), hallucinogenic, or harmless.
There are several types of fungus that can grow in the lawn including mushroom, dollar spots and fairy rings. They have a way of taking over the entire lawn in a hurry. The first step to prevent them from forming is to keep your lawn dry. It is best to water the lawn early in the day to give it time for the sun to dry it. To kill existing fungus you can try a mixture of baking powder and water and then spray that over the fungus. Using plain corn meal can also do the trick. If the fungus is the slime mold variety then raking or mowing will help. If you have fairy rings then spike them.