Firstly, welcome to ribnet!
I guess we're talking nose in the air, and not a lot of forward movement? That could be down to one or a combination of factors -
- weight too far aft
- engine trimmed to high
- prop pitched for top speed rather than accel.
Before you messa round with new props, try playing with the engine trim. Not sure if you manual or power, but if manual, drop it in towards the transom hole at a time & see what happens. If power, tuck it full under & once on the plane back it out again. (And check your "manual stop" pin is not at the outermost hole)
Weight distribution - move something heavy forward (on a 3m even lean yourself over the wheel may be enough or "jump" on the floor to force the bow over it's own wave) If you;re on tiller, shuffle forward as far as you can get.