If you do manage to make him hold up his end of the deal, don't let him pull the engine- - - -do it yourself. It might get sabotaged in the process. It would be better to get your money back and then give him a million dollars' worth of bad publicity on every social media source you can think of!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!