I had a Merc dealer do mine. He was a younger kid, the sone of the owner of the shop. I had him replace it cause the place I always go to was behind 2 weeks. The cost was $165 . Turns out my 25 horse did not go in reverse after the impeller was replaced. I took it back and he fixed it. I go to the lake and it was not fixed. I ran it without reverse all summer and took it to my regular mechanic. Another $153 later , it was fixed. It turns out it had a missing washer . It works now!!!! Just make sure you do it right.
But the fruits of the spirit is love, joy, peace, patience, kindness, goodness,faithfulness, Gentleness and self control. Against such things there is no law. Galations 5: 22&23