I just recently bought a 91 surpass with pump used. It's a wonderful running engine. It's a little harder to start than my other 4 strokes due to the pump (The engine starts fine, there are a few things you have to do prior to starting and it has to be started with an electric starter). I am also really impressed with the over all quality of mine. Now the pump issue, I happened to buy mine as a package deal , the engine came with the plane I bought and the engine is indeed a pumped engine. From what I have read, it my be cheaper to buy a non pumped version and add one of the after market pumps to it. I understand that alot of the OS replacement parts that deal with the pump can't be purchased very cheaply and it might be cheaper in the long run to go after market. If you feel that there might be problems with the mounting of the fuel tank in relation to a good fuel flow to the engine then by all means go witha pumped engine.