CAN SOME ONE TELL ME HOW TO INSTALL A TACHOMETER ON A BAYLINER CUDDY 19FT WITH A 125 FORCE? I HAVE A 3BLADE 13 1/4 17 PITCH PROP AND THE BOAT SEEMS REAL SLOW 30-32MAX! NEW TO BOATING AND I WOULD LIKE TO FINE OUT WHAT MY RPM ARE AT WOT!! THANKS IF YOU CAN HELP