I just picked up a new to me boat that has a '95 merc 2-str 30hp EO. It's been sitting for at least 2 yrs, more likely 6+. I helped the previous owner put in new trailer bearings about 7-8 years ago an I suspect when we took it out then was the last time it was run on the water. I moved out of the area 6yrs ago so it may or may not have been run on the water or in the yard. I've never owned a Merc before let alone anything with oil injection so I'm in uncharted waters. However I have and still own Johnson/Evenrude motors and have always done my own work on them so I'm not too stressed about it. Things I've done: Poked and prodded for anything obvious. Cleaned out the fuel filter. Run motor with pre-mix (50:1) Disconnected the oil line before the check valve and run the motor with pre-mix (50:1). Observations: Started up sooner and better than I expected. Yay! Ran rough, as expected, especially with both the oil pump and pre-mix together. Ran better after a while and even better after I disconnected the oil line. It would need a little throttle after a few minutes of idling (again not unexpected). Oil was pumping, but I don't have a reference to say if it looked right or not. I imagine it was though. The amount of cooling water was much lower than I am used to (Johnson comparison). Things to do: New impeller/water pump. Not worth the risk of not rebuilding/replacing it, I don't need the impeller blowing up at WOT an hour away from the ramp. Check to see if oil pump is supplying enough oil. General lubrication. Check/replace lower unit gear oil. Scrub the few corroded areas and Boshield/Corrosion x everything. Take it out on the water and let it stretch its legs and lungs some. Anything I've missed? Anything to watch for? I'd love to download an owners manual, but I came up empty when I searched. Any suggestion where to look? It appears that the 30 and 40 are built on the same powerhead, how tough is a conversion, if even possible? I'm not sure I would even want to, but it would be nice to know what is involved.