One of the primary reasons why people love juicers is it allows them to consume their daily need of fruits and vegetables without even realizing that they are. Being able to blend all sorts of different fruits and vegetables into an appetizing drink (sometimes) is a godsend, to be perfectly honest. As such, in theory, yes, owning a juicer could help you lose weight but it still rests on your shoulders. However, you could begin performing what is known as a juice fast.
In this type of diet, you will replace your meals with fruits and vegetables. As this will lack any solid food, you will probably lose weight at a rapid pace. Then again, you still need to consume fewer calories than you burn to lose weight. Given how difficult it will be for some people to refrain away from solid foods, just ensure you get a healthy dose of fruits and vegetables every day and that will be a great start.