What is the deal on these motors. I bought one a while back on a 17ft bass boat. The motor is extremely strong and does everything well. The manual has no listing for them . I thought it was just a decal job but I have seen a few more of them running around the lake . Mine was a 78 I have since sold it to a friend.(It's still in my boat house)and have been told they were factory hipo's is that true?