Hello and thanks for all the posted info.I am a first time user on any owners site so please beAR WITH me.We have had many boats 8'-39' but the small ones have been the best fun. Just perchaced a 1974 V-174 / aq130 with trailor for a great deal. Have not launched ityet ( Too COLD ) but she runs great. My Question : For top speed only what prop size ( Not S.S ) would you guy's recomend ? I have a 14x13, 14.5x16 . Would a 14x21 or 23 aluminum be too much for the 4 cyl. motor ? Boat will only have on light seat for the speed run. Thanks for your recomindations if any. Regards Chris, Boston, Mass.