In 1812, Peter Galliard invented the lawnmower. Later, others added a gas engine and a tough chore became a lot easier. Spring's here and soon it will be time to bring yours out again after its long winter hibernation. There are things to do before firing it up and taking it out for a spin. First, remove the spark plug wire. Then check the blade for sharpness and balance. If dull, remove it and sharpen it with a file. To check balance, put the center hole on a screwdriver or on your finger tip. The heavy side will be lower; keep filing till it's balanced. Also, clean the housing inside and out. Lubricate all moving parts including wheels. Then fire it up and head out for a spin. But, don't use last year's gasoline -- it'll gum things up. Remember safety: Before you hit the turf, check for debris that could become deadly missles. With a little care and extra effort now, you'll have a beautiful lawn all summer long. And that's the On The House tip for today.