Hi, I am new to the forum nd hope to find some answers. A friend of mine gave me a Mercury 9.8 hp (merc 110)and said was a 1975 model, but can't find a serial number anywhere on it. It has the lightning ignition and red stickering. I also have a 1973 9.8 hp (merc 110) that i just bought from a friend for $50 in hopes for parts but seems to be a newer model because of the thunder ignition and has blue stickering. can anyone help me to find out what year the first motor is?