The engine is regarded as being hard to break, especially if you change the oil often. It is really really a good idea to clean out the engine oil filter (located at the bottom of the right side engine cover with a big hex head) every 500 miles (Honda's recommendation not just mine)...
Check the oil level with the engine off and sitting on a level surface. The dipstick is built into the filler cap, next to the recoil starter. Do not screw in the cap when checking the oil level. To change the oil, remove the oil fill cap and tip the engine over a suitable containe...