Does anyone know what the fuel economy should be ball park with twin Cat 3208T's on a 390 Sedan Sportfisherman. I have three blade props on and the engines are each 320hp. I ran it a few times against the GPS speed and fuel burns were approximately
1800 rpm--11mph--.86 mpg
2000 rpm--13mph--.74...
Parting ways with my 1986 SeaRay Sedan Sportfisherman.
The engines are 3208T Caterpillar Diesels with approximately 1830 hours on them.
Westerbeke generator 8.0 BTD with approximately 2500 hours.
Replaced both raw water pumps and hoses along with flushed and replaced all the zincs. Also...