I have had it running very well, It was built by a gentleman out of florida, that no longer makes engines. It can run off of coleman fuel for regular unleaded gas. The engine overal is 12 inches long, 7 inches wide. The flywheels are 5 1/2 dia. Could be a great collector piece for someone that has interest in gas engines. The item “Scale Hit and Miss Engine” is in sale since Monday, June 22, 2015. This item is in the category “Toys & Hobbies\Vintage & Antique Toys\Other Vintage & Antique Toys”. The seller is “ks1993k” and is located in West Des Moines, Iowa. This item can be shipped to United States.