Early model atomic 4. The engine was pulled from a 1967 pearson renegade. The carburetor appears newer. The starter was purchased last year from Moyer and has not been used. When I purchased the boat the engine did not work. The engine needs some work but has all the makings to be a good engine. Several of the studs need to be replaced. I have many parts not listed in the pics that all go with the sale. Including the tune up kit that I purchased from Moyer. Sale is for pick up only. Text me for information. The engine is located in Alexandria, Virginia. Text me on 443-424-7660