The corrosion issue with the lower unit applied mostly to the V-6's, but check around where the prop goes into the lower and see if there is any corrosion or signs of splitting in there. Those are actually good engines really, only downfall is the injectors. If they don't get used often enough the injectors will clog up and burn a piston. The 140 SUZUKI is a decent engine for power, but lacking in torque compared to other 4 cylinder 2 strokes in it's HP range. They're also good on fuel as well. I worked on a flats boat beforewith one on it, and it took me over an hour to burn out the 6 gallons of gas I put in it cruising(that was a lightweight hull though). Used to go out with a friend of my dad's that had one on his 22 center console and we averaged about 25 gallons a day with it and would run about 100 miles. Make sure the compression is even, and have it checked out by somebody who KNOWS SUZUKI's and there oil injection systems to make sure the linkage is set correctly. And with any SUZUKI, check it for corrosion THOROUGHLY! that is there only real downfall is the aluminum they used is prone to heavy corrosion.