Advantages of using one or another type of motor
The four -stroke motor works quieter and more stable, but it is not for constant transportation and is quite complicated when servicing. You can choose it with the boat here.
The next parameter is engine fixation. If it is supposed to be riding in unfamiliar places with the impossibility of constant depth control, then it is necessary to choose an engine with a structure that allows not to fix the engine hard. However, with high -speed movement on the waves, periodic lift and lowering of the engine may occur, accompanied by blows on the boat. In this case, the possibility of rigid fixation is simply necessary.
There are engines that allow you to change the slope of the installation. This is necessary for the opportunity to move around shallow water using a motor.