Yeh, the whole reason im going to buy those two motors is because it comes with the shaft and the boat propellers. The motors i have look the same as those, there about 2.5cm long by 2cm wide, ill measure it when i get home, then ill ring the hobby shop and find out what size the motors are. One motor on my setup is a bit weaker than the other aswell so two new motors would be good. Iff there the same, ill buy them and put em in, how fast will it go with those two small motors? My airboat didnt go very fast as they werent very good props, hopefully these ones ( if i get them ) make it go faily fast.

EDIT: Oh i forgot to mention, the radio gear is 27mhz