Okay, everybody, I hope you’re all sitting down…Honda just sold me their last few, BRAND-NEW H5518 REPLACEMENT ENGINES! I am now the sole supplier of these FACTORY NEW, run tested by Honda, replacement engines. They are complete, meaning that not only are they long-blocks, but they also include carburetors, air cleaners, water pumps, coils, starter motors, etc.; THE WHOLE NINE YARDS! FULL DISCLOSURE;Since they were sold to me on a close-out, no-returns-accepted final sale, Honda does not provide any warranty coverage on them. Is your existing engine tired? Even if your engine is okay, how’s your carburetor (was $316.12)? Starter motor (was $903.46)? These items are no longer available from Honda as replacement parts. Stock up for the future, and get the entire engine assembly now for less than the individual price of many replacement parts that are no longer available! 10/03/16 UPDATE! After going on sale one week ago, I ONLY HAVE ONE LEFT! GET YOURS TODAY! When Honda was selling these new, they sold for $1,526. Today, you can have the last one for 60% of the original price! (Price DOES NOT include shipping; you can choose local pickup or shipping on a pallet via common carrier trucking.) I have been asked, but cannot answer, if these will work in an H4518. Off the top of my head, I don’t see why not, but I cannot say with any certainty one way or the other. It’s your experiment. NO RETURNS.