Small Engine Tips

The first a most important thing. Check your oil!! Oil is much cheaper that a new motor. Also be careful not to overfill your oil. A guy gave me a lawnmower, a while back, and he said the motor was shot because it was burning oil. I got it home and drained about a pint of extra oil out of it and it was fine.
Use sae 30 oil in the summer. This will help the motor stay properly lubricated when it is hot. Use a multigrade, such as 10w30, in the cold so the motor has proper lubrication at start up.
Do not use dry gas or other additives in you gasoline. Some preservatives are ok but generally I wouldn't leave old gas in the motor. Dry gas burns very hot and can cause severe internal damage.
I will add more very soon.