A friend of mine just gave me two fuel tanks for my 1972 Johnson ESL 50 hp. I also have a 1990 9.9 hp. Evinrude the fuel fittings are a little different. These tanks have a few extra points? Such as two pins and an extra 1/4 pin. with the usual feed line and a pointed shaft for the hose to clip too. Are these tanks compatible with both motors? Thank you in response.