I have heard this as well, didn't find anything like that on the inside. I will look again. Ordered a carb kit and fuel pump for a 1975, will see if everything is as it should be.
Can anyone help my ID the model number on this 15hp Evinrude I picked up? Would like to get it running and need to order the correct parts. The model number and serial number plate is missing. Based on some googling I think it’s a 1975?