There are some similarities to my 98 Ocean 6.25M
The Guys at Windsor brothers are very helpful when they answer the phone, you'll probably get Malcolm one of the brothers that own the place.
If you can find the hull number on the transom Malcolm will be able to give you some more info, but if its in the same place as mine it'll be under the aux bracket thats been fitted.
I do have some info regarding the hull numbers etc so if you don't get an answer on the phone send me a PM
I'm running a Suzuki 200EFI on mine.
It's very comfortable in a heavy sea, cruises at 25Knts, and wide open on a flat day with a light load I've seen 52knts.
RIBBED For extra pleasure.
Member of the ebay Blue RIB cover club.
Member of the Bombard 380 Aerotec club