hydraulic propulsion for tugboats??

[tugboat]

so I think ill just close this thread for now- I got lots of info from great people on here- Lurvio- Tony and many others. all have been positive in helpinbg me understand this and give me an idea of what to expect.
i have a d318 cat 94 rated hp @ 1600 rpms--pushes a 36 x 34 prop

it uses more fuel but then again --its simple easy to install and I know what im doing with it..i would have liked twins, but nothing is perfect,...
Lurvio--tell me how I can add some points to your user CP?--id like to give you as many as i can for what its worth...?
Tony--Where did you get that info!!!!?? awesome job...