Buying the part yourself and installing it can save a lot of money! Search for a great deal online and you're more than likely going to find it. It's always good practice to check out the prices for a spare part for your Ariens 991087 from several different places. That way you can be sure you're getting the best deal. There are usually more than one company producing the Ariens max zoom 60 in. 25 hp kohler 7000 series pro v-twin zt3100 transaxles zero-turn riding mower part that you're looking for, especially aftermarket-type spare parts. Find the right part and fix it right!