Please get a service manual, and do it your self, our impeller cost just $ 13 bucks at I-boats.com. You need to change your impeller yearly, may as well start doing it yourself now. And The aggravation of taking your boat to and from the shop every time
There is ongoing maintance and winterizing every year as long as you own the motor, its easy and fast to do, youtube explains everything well, plus you have the forum, for the hard stuff.