I have a 5 1/2 johnson seahorse that was given to me. I have the original fuel tank as well. The model number is CD10 and the serial number is 1083079. I'm told the motor still runs but I haven't tried it yet. Can any one tell me what the proper ratio is and possibly the year of this motor? I believe it is a 1954 model and it is in good to excellent condition. I want to try to use it this spring on my 12' glassmagic boat and take my 5 year old son bass fishing. Thank you.