Hello friends , I have recently purchased a 1967 M15 Rich Line aluminum boat and for the life of me I can't find any info on this boat to save my soul . I know it's 15 ft long and 5 ft wide at the widest and 52 inches at the transom , can anyone tell me a formula for figuring out the safe weight capacity for this boat . I'm running a 1962 evinrude 5.5 fisherman motor on it at the moment . Thank you for taking the time to read this post .