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We were are making a nice new upgrade in the engine department. We are removing our Palmer P-60 and replacing with a remanufactured Yanmar 3gmD, with a Kanazaki Km3V v-drive, with at gear ratio of 3.20 to 1. I have a few questions that maybe some of you can answer. One being the exhaust our current exhaust set up has a heat exchanger (for hot water heating) that will be removed as it won't be needed. On the Yanmar with a V-drive the exhaust is going to exit towards the bow, does exhasut have to slope downward the whole distance tell it exits to work properly. I have included pictures of our motor, our exhaust set up, diagram of our exhaust and a picture of a Columbia that had this conversion made (very nicely done and my insperation). Thanks for all the help anyone can provide.