The Mast
One important thing to look for is the mast. Check to make sure it has the heavy mast. It was a change that was made around 1986. I had the first heavy mast and it was warped in carbon fiber to make it stiffer. Big difference, Enstrom kept putting on more HP and kept the original mast from the first A models. They use to wiggle in the air and with the control tubes so close together running up through the center any movement makes big changes out at the pitch change links. The stronger stiffer mast eliminated the mast flexing and made it feel as solid as a 500. Also the stiffer mast made the lamiflex bearings last much longer. The Enstrom is a great aicraft. It was the first one I owned. Good strong belt system and nice heavy blades for ato's. When doing Auto's make sure you get it level before touch down. The tail likes to hang low. djb