Hello. I have a Lesco 54" zero turn that I inherited from a lawn business I bought. It has never run for me, nor have I tried. I am now trying to get the machine up and running. I am being told that the small block on the engine is bad. I am not very mechanical, by the way! However, I am being told different information. If I can get my hands on another engine with a good block, can I replace it with another. I am being told by some that you can, and by others that it won't last but a couple months and to buy a new engine. I believe it is a FH680V. Any suggestions or help? Please!