I have a 15 HP Evenrude and it is missing the Model serial number tag. Original paint in the holes so it looks like it never had one.<br /><br />After reading the posts here I checked for the number on the plug which was located on the top of the motor block. The number is C7194130 which does not seem to corrispond to the model serial numbers I have seen listed in other posts.<br /><br />The motor has a label on the cowling indicating that the mix ratio is 100/1. Which should indicate that it is a newer vintage motor. I orginally thought that it was a 70's vintage but a friends 70's vintage 9.9 which looks the same is run at 50/1. <br /><br />Need the year/model to get water pump parts and for future reference.