I have an LT25 with an 32SX engine. This is more than needed and shows up at takeoff and when you try to land. For fun I go to full up elevator and and then go to full throttle! The plane will take off in about 10 feet and climb like a rocket almost straight up! On landing however at idle the plane takes a long time to lose altitude and doesn't really want to stop floating over the runway. I have learned how to deal with this by throttling down to idle on the downwind leg before turning to final to kill speed and altitude. With a 46 size engine, even at idle the plane will probably just keep cruising along making landing very difficult unless you dive for the runway or cut the engine completely. Neither one is the preferred method of landing! For an engine I would go for something cheap and reliable such as a Thunder Tiger Gp25. Its good for the LT25 to have its own engine anyway and the smaller motors run a lot quiter and use way less fuel![8D