Just got my 60 HP spark on the water today after the following mods: 1.) Vtech tune (202 8500 test) R & D intake. Ski has new plugs, new wear ring and perfect stock prop. Water conditions were perfect flat water 62 degrees no wind. I could only get 8250 rpm and 50 mph. Out of the hole acceleration was awesome as well as overall throttle response. Highly recommend the V tech tune to any and all spark owners. Has anyone done the tune and added the solas 12/17 prop? stock re-pitch? My next mod is the free flow exhaust and prop. Seems to me the prop is limiting the top speed.. should be faster that that with almost 8300 rpm. Your input is greatly appreciated!