Military 4A084 engine. Complete. 84 cu in opposed flat 4 cylinder. 20 rated hp at 10,000ft. Good for 40-50hp. Magneto, electric start, good compression. Built 1968, military rebuild 1978, phased out shortly after. Should be a good runner. Ideal for small air boat or prop snow sled if stripped down. Good stationary power or buggy engine with shrouds and blower left intact. Have been used in homebuilt aircraft. Believe I have the correct mechanical tach for it. Been stored in a heated shop past 20 years…my project never got started. Lots of potential! Easy two person lift.