I use this to change the oil on a Seadoo boat and Seadoo jetski. For a few years I had the small electric pumps that worked ok but you had to keep messing with it to keep it sucking. This one you just put it in the oil tube, pump and sit back. It does require a few more pumps over the time to remove all oil but it does a great job. Also the part the oil goes in makes for clean easy disposal. The electric ones don't have this so we used a bucket and the oil would splatter. Always heat up the motor you are removing the oil from first. Thins out the oil and makes it a lot easier. Second season using this with no issues. Works great.