Question incorrect WOT

[SeaAyeOwe]

guys - I have a wot question and have seen some contradictory threads, 2005 320da with 350mpi horizons and b3's.
Clean bottom and props with new bottom paint in last couple of months
90% fuel, 75% water,350lbs in Two adults.
Dinghy on back with 15hp Yamaha - see pic in Signature.
Reasonable day in open water 2-4 knot winds and 2ft waves.

What would you say my WOT expectation should be?

 

[av8ingtom]

4800-5200 rpm

 

[Charlesoceanone]

My understanding is your WOT should be the engine rating and not depended on fuel load etc. on my Cummings 425 I should make 3000 rams. I understand there are variables but the figure you should start with is the manufacturer rated rpm. Please chime in if I'm wrong!

 

[SeaAyeOwe]

My wot three years ago was in the 46-4800 range depending on conditions and load - I had seen a degradation over the last three years and had bottom painted thinking it would make a big difference - last week I could not get her above 4300.
In my experience load and weather have a material impact on wot, but this is more than I would expect.
I think I need to get to emptier load and offload the dinghy and try again.
Some may recall I had an engine issue last year and ended up replacing all plugs and DIST cap.
Meanwhile - tests I should consider, please add to the following with suggestions:-
Lower load wot test
Diagnostic to look for codes
Compression test (maybe a leak down)
I will dive the bottom again to look but I feel sure it is good.

Anything else?