1983 23ft seacraft cc Questions????

[Boatboy6]

With a 1996 Johnson Ocean Runner 225on out 1984 cc we top out at 38kts lightly loaded and cruise at about 4400 rpm doing roughly 25kts. The boat has no t-top and an open transom. We have the 144 gallon tank and dont ever really need that much fuel, but when its full you can really feel it, the boat turns into an absolute tank!