I have a tracker 1448 weld mov jon with 25hp merc on about 25mph, can’t take the big wakes from other boats at speed with out a beating though. pm me if you want to see pics.
look down the throtle body to see if there is oil sitting on the bottom of the intake. this engine had a problem with sucking in the gasket on the inside of the intake manifold. pm me if you have more ?