I have this 8M Mercury that I got from the insurance company after my son dropped the old motor into the lake. I have never used the motor and has decided to sell it. Normally with an old motor, I would run itand show people it works. With this engine, as it has never been ran, should I be running it for anyone that comes by? I do not want it to become a used engine because I am showing it to people. What type of problems could the engine have after never being used and sitting for 18 years? The other issue is I do not have a test tank to run it in, so what do you do?