Originally Posted by T4Syncro
Crew has varied from 4 to 7 and we've shifted them and kit around but it still didn't feel quite right as if it was stalling.
Hi T4Syncro..I doubt it is a pressure problem.. at least my one seems to be happy to perform at various pressures..including recently having a punctured tube which have no pressure in it .. and still performing well.
I think possibly the answer is in your statement above. Too much weight for a 20 hp to plane properly. The SIB is a heavy brute to begin with ..so will be over 150kg for boat and engine ..add 7 folks and its asking the OB too much to perform well.
My 25HP planes no problem with four adults ( and that includes myself as driver.) It get sluggish with many more .. but I have never had more than five in my boat.. as the performance would be crap with my 25HP
but take my opinion with a pinch of salt as I have never tried 7 or 8 in my boat.