I dont know how to test it. It looks to be missing one screw. The prop spins with a little resistance. The handle pulls and the swivel works very well. The item "VINTAGE JOHNSON SEAHORSE 25 OUTBOARD TOY BOAT MOTOR PARTS MODEL SCALE ELECTRIC" is in sale since Tuesday, February 12, 2019.This item is in the category "Toys & Hobbies\Electronic, Battery & Wind-Up\Battery Operated\Pre-1970". The seller is "kob3" and is located in Gainesville, Florida. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Uruguay.