Can someone tell me what the recommended shaft length of the motor for a H26 should be? Is it 20 inch or 25 inch? I currently have a 20 inch, but some say go with the 25 inch. My concern is that the longer length may cause too much stress on the mount, with the prop 5 inches lower in the water. But I can also see the advantage while motor-sailing on a starboard tac and the boat healing, the prop will stay in the water better.