One, I am far from being a mechanic. Two, I am learning real quick. Some bad person stole my raw water pump along with the pully. I have gone on the site of Yanmar and a whole lot of else where. This Sierra keeps popping up. Can someone please help me find this pump either Yanmar or a universal. I am ready to get on to the Caymans. I have a 3gm, 20 horsepower. 