A Mercury outboard motor of 40 hp one can place on any boat downloaded from the DLS. 100 polygons in size. The item installs about 7 metres high off the ground, as the item follows the ground level and NOT the water level (Auran's programming!), one only needs to adjust the hight of the item with the hight adjusting tool in Surveyor to place the item on the water. Make sure your water is LESS than 7 metres deep or your item WILL be below water level in the game.