I have a 1976 evinrude 55hp mod.#55672E and i just had it rebuilt.it's on a 1977 4 winns 15 ft. boat. i have a 17in. prop on it and with 4 people in it i can't get it over 9mph, with 2 people in it it will go 27mph. what wasn't bought new for it was rebuilt. i was told with a 15in. prop it has...
