Hi polotche
It's a shame you haven't managed to sort out the problem yet.
I'm not totally certain, but it looks like your prop is much bigger than he average size for that engine.
Also, as I presumed earlier, I'm glad you got the water out the hull....problem with this is that once there is water in there...it can take a while to totally dry out. You might find that your hull has absorbed a fair bit too (can be like a sponge in extreme cases) and may be holding 10's of kilo's of water and weight.
Anyway, I've had a few beers and can't be bothered looking back to see if you said what specs your prop was or not (I'm on the mobile, so not easy)...point is, it looks very much like it's for a bigger engine diameter wise.