Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worked Great....for a few minutes

I was excited to try this thing...despite some of the reviews...anyway...I had 4 gallons of oil to drain...the first 3 went perfectly...then, NADA!I took the unit apart..everything seemed in perfect working order...put it back together...switch works, motor works, shaft turns, impeller spins...but No Suckage!For once...not sucking is a bad thing!