Thanks Nordy

The boat total weight with 550 lts of fuel, 150 ltrs water and 4 person on board is 2998 kgs.

The boat is a MAR.CO 25 Cabinato Special edition
If you click on my signature you can many photos and videos of this boat.
Right now is very difficult to make a decision to change an engine (which is going to be expenssive) or just change the prop to a 15 3/4 x 15 Ymaha Salt Water Series II?