[Fr. Frank]

The 150, 160 and 165 hp Mercruiser inline 6 motors from 1967 through 1973 were all 250 cid.

In 1969 Mercruiser made what was called the "250/250".
It was the 250 cid inline 6 made to produce 250 hp. It had a marinized version of the Carter Thermoquad carburetor on an intake manifold made by Offenhauser, and through-hull exhaust.

Thunderbird made several 23' Formula hulls equipped with twin 250/250 motors for the offshore racing market, and I had one of these in Waterway Marina in Palm Beach Gardens in '83.

Anacapri also had the twin 250/250 setup listed as an option on their 24' hull in 1969. I don't know if they ever actually made one.

I know AMF/Slickcraft produced at least 5 of their 1969 23' hulls with this power setup. My Dad owned one of them, and his was the 5th hull made with that power setup. When I was 10 years old, I thought it was the fastest family boat on the water 'cuz it would run about 50-55 mph.


According to the records I can find, Mercruiser only sold the 292 cid inline 6 motors from 1969 to 1973, and they were rated at either 200 hp or 215 hp.