Hello all. I recently was given a Montgomery Ward Sea king 5hp. Model # 15gg-9015; Serial # 394905. It has been sitting a long time. Upon removing the gas cap I could see the threads are covered in old gummed up gas, what little gas that came out of it was orangeish/brown. I was wondering if this is worth putting a little time and money into, I am fairly handy with a wrench. I could not find a year designation or manufacturer on the motor. Thanx in advance for any help or advice.