This powerhead is off a fully running 1990 Mariner 200 hp freshwater only motor. This was a trade in four a four stroke that parts were needed for another motor. It had compression numbers of 105 across all 6 cylinders. It’ll fit many different years and size of Mercury/mariner outboards. Comes with what’s pictured. If there are any discrepancies with your order, please reach out to us before leaving a comment. We accept returns and provide refunds in the case of damaged items and items listed incorrectly. It is your responsibility to make sure this is the right part for your application. Just because the part looks right does not mean that it is the right part. If you are not sure that it will fit your application, please take the time to do the research prior to buying this part. If you would like us to check if it fits your model, please email us with your model number, serial number, year and HP. We will try to answer fitment questions to the best of our knowledge and resources.