So finally I have stripped off the many layers of paint and have found the all important numbers on my props - B5 !
Following successful sea trials in the Summer after a complete refit, once the engines were run in, I have found that I am achieving max rpm (4,600rpm) at about 3/4 throttle. I think this is just before the second choke opens. Fantastic initial acceleration and also achieving excellent midrange acceleration. At 4,500 rpm I had 45mph on the speedo and 38knots on the GPS. No problems with the engines at all across the rev range.
Full details are:
2 x brand new 5.7ltr GM V8 315hp per engine - 630hp total
2 x re-furbished DP 290 drives running B5 props
Vessel - Triana Tropica 25ft
Approx weight 4 tons - this is a calculated approximation
Max rpm at WOT 4300 - 4600
There is video on my Youtube account at
Can anyone advise on what props I should be changing to? And is anyone looking for some undamaged B5 props when I carry out the change?
Any help greatly appreciated