ndaniels

Have a friend thats trying to identify em...

Biggus

iTrader: (1)

Stern Powr, MX1 I believe

John the Drive Man

Those are Stern Power, Worked on many off them very difficult.

blackboat

They are the older style. Sternpower updated their transom assembly in later years.

cigrocket

iTrader: (3)

I had MX- 7 on my old Sonic. Do a search, they were discussed a few times. you can still get parts direct as of 2005. Not to many that I see....ever. It was impossible to get props, they now have conversion hubs. I sold my boat with 2 sets of props. Supposedly they could handle quite a bif of power. They required trannies, they were not shiftable.