hello i had a friend that had a boat by canyon was going to fix it one day, anyway short story grass fire happend and burnt the boat but the stern drive was still goo even the alum prop, trying to figure out what kind of stern drive this is the only information i have is the PZ NR B22002and PAT # 2977.923 and there was a number underneth the exhaust flange thing that goes in the water it says 21157 guessing its a part number thnaks if you can give me a sight to find the numbers thaks agian any help is appreciated
