Both engines will fly your Tiger 60 very well even off a grass runway. The 65LA will do it for less money (about $60 less)! The LA series uses an air bleed carb (one needle for adjustment) and is very user friendly but will not work in an inverted instalation. Tiger 60 mounts upright so it's good for this airplane. The FX series engines uses a two needle (idle and high speed adjustments) and is also very user friendly and will work inverted but that is not needed in this airplane. The FX makes more power than the LA but again it's not needed in this airplane as the LA has plenty of omph for the Tiger 60. If your a newbee or on a budget get the LA. If your OK with a two needle carb or not on a tight budget get the FX as it can be reused down the road in a wider variety of planes. Both engines are winners!!!