Just got a 2002 Sailfish with 2002 225 4 Strokes. The boat came with a 15-1/2 x 17 TL prop on the port engine and a 17-M prop on the stbd engine. What do the "T" and "M" designations mean. I believe the props are different diameters. I'm not sure. I posted this on THT and got some good feedback but still not clear on the meaning of T and M on Yamaha props. Also I was sent a link to a Yamaha performance bulletin on this same rig with SWS 15-1/4 x 19 props showing some decent numbers. Is anyone out there running a similar rig. I thing this boat may be underpropped as is with th 17P props. The 225's will rev up to 6100 wtih a full tank and 3 people on board. I welcome your comments. Thank You.