Losing power

[cozza]

Alright peoples not sure on where to start here but is losing power almost every time I take it out. I've got a 26 foot 3.5T with a AD41B with a DP-E leg. At WOT I'm getting 3600rpm. 1 month ago I was getting 24knots and everytime I take it out it's getting less and less. Now I'm pushing 14 knots. It has a near new turbo and the anti foul gets done regularly. So I'm not sure where to start checking.
Thanks in advance

 

[Scott Danforth]

Start with fuel pressure on the supply and return. Also, boost pressure before and after the CAC

 

[jimmbo]

The boat's not gaining weight, as in taking water on?

 

[Bondo]

Ayuh,.... Have the Contents of the fuel filter been checked for anything, but good clean fuel,..??

Water, 'n crud will restrict fuel flow, which limits horsepower,...

 

[alldodge]

Yes do check the filters for crud causing a fuel restriction, has it been changed?
Checking fuel pressure as Scott mentioned could tell you a lot.
Don't know (will have to look) if this diesel has a screen inside the banjo bolt feeding the fuel pump, or if the screen in the tank is clogging.
Hope you can be sure of getting clean fuel when needed

 

[cozza]

Thanks guys I'll start with everything to do with the fuel and see how I go