Place a drip pan or other container on the side of the mower with the filler. Carefully tilt the mower so oil drains out and into the pan. Discard the spent oil into a proper disposal vessel. Now slowly pour fresh oil into the mower. For the specific type of oil you need check your instruction manual. Make sure to add only as much as your particular model requires. Remember to let the mower sit undisturbed for a few minutes so the oil settles properly inside the engine.
The 190 cc engine allows you to mow at a decent clip and it starts more easily and runs more efficiently than most side-valve engines. Also the rear-wheel drive makes it so you can mow inclines and hills effortlessly. There are more features than we have space to cover here but we would be remiss if we didnt touch on the Versamow system. This system allows you to choose how much grass is mulched and how much is bagged depending on your yards conditions. It also lets you shred leaves so you no longer need to use your leaf blower.
With the mower still on its side grab your socket wrench and wood block. Place the block inside the blade well. This is to prevent the blades from turning while you loosen their bolts. Remove the blade mounting bolt/bolts. A typical mower will have one blade like the Craftsman 37700 I serviced for this guide (one mounting bolt). Some like my Honda HRR216VKA have two blades an upper and a lower (two mounting bolts). Each blade should have at least two cutting edges.