I have a 98 lx700 with a 115hp mercury. It is my first bass boat and I bought it used about a year and a half ago. I really like this boat. I get about 54mph speedo but still have a little throttle left with a light load. My prop is a 21" and I'm thinkin of going to to 23" to get a little more speed. I think a 115 or 125 is a great motor on this boat - just depends on how fast ya wanna go. After shopping around and looking at most brands, it seams that on a glass boat:
17' = 115hp; 18' = 150hp; 18 1/2' = 175hp; 19-20' = 200hp
on my rig, it sometimes gets a little loose above 50mph depending on conditions. A jack plate might help out above 50mph. I recommend a nitro boat as mine has brought me home safe and dry every time and has stood up well with heavy use. I think the lx700 is the best value for the money on a glass boat and gets the job done. It is easy to tow, reliable, beautiful, handles the waves, and goes a long way on a tank of gas. I do not think that I would like it with less than a 90hp on this boat. 115 or 125 is your best bet.
james d.