My neighbor gave me a old self propelled mower that his brother gave him for free. I was originally going to use the deck off of it but I bought two me mowers instead. I still would like to fix it though. The mower has sat outside, without a spark plug, for who know how long. It isn't seized, but it has no pull cord, and no blade. The first question that I have is it worth it to tear it down and try to get it running again? If I was to do this how would I change the pull cord? It looks like it is riveted down. I have no clue as to what year the motor is, or even what brand it is. I would imagine that the mower is about 15 years old, and the engine is probably about four horsepower. So is it worth it to fix it? I would like a little challenge.