Re: OMC Coupler????
Uh....My 1987 was a "King" (sic) Cobra. My brother bought the boat new in Las Vegas around APR of 1987.
I think the only one called King Cobra from 87-89 was the 460. After that they started calling everything "King" Cobra it seems......the 5.7L and above with the cone clutch drives was also called King Cobra from about 1990 on although they did still offer the "dogs" too....(wait a min.....they were all dogs!!

)
It's good you're swapping it out for a Merc!
If you're lucky you'll be able to sell all the OMC stuff on EBAY or some other site...
I have sold most of the OMC King Kobra so far. All I have left is the drive, props, trim cyls/pump and the steering stuff....I have been very lucky to have sold most of the other stuff!
Cheers,
Rick
But i have seen a 87 stringer with my own eyes.
I would guess that what you saw was an 1987 boat with a Stringer in it........It's not uncommon for boat makers to use last years engine/drive combo because they got a super deal from the eng/drive manufacturer for models that were not all sold.........