You've managed to design and sell the greatest piece of shit known to man, CONGRATULATIONS! Thanks for the back pain. I followed the instructions (btw, the instructions say to drain the oil when the engine is cold, and on the other hand it says to drain the oil when the engine is warm (not hot). Suction hose off to feel the suction, useless, the suction is barely enough to get a paper towel to the inlet. The motor has started to rattle/vibrate intermittently which is a sign it is starting to fail (haven't used it for over 30 minutes as directed) LOSE YOUR MONEY.