Ive aquired an old Elgin motor, it has 2 cylinders, its green, fuel tank is built into the top cover, it has a little knob on the side to engage, disengage the prop, It has no tag on the clamp, Ive looked for model and serial numbers on it just about everywhere to no avail. Is there some where else that these numbers might be? Or another way i might be able to tell the size and year of this engine? It needs points and maybe a coil. Only numbers ive found are on the cylinder side (23010) Any Help would be apprecated, Thanks