The full throttle RPM was 4500-4700...
Hope that helps 
"Woodchuck"  wrote in message
...
 What's your present full throttle RPM?
 "M.E."  wrote in message
 ...
  Hey!
 
  I have a 17' Bowrider (fibreglass) and it has a 140HP I/O Engine.  It's
a
  1977.  I have a 14x19 prop on there right now... I had it up to about
 40MPH
  and it seems decent at initial acceleration.  I'm looking at purchasing
a
  second prop for it as a spare but would like to get one to compliment
the
  existing one... I'm looking for suggestions on what to purchase... Does
it
  have to be a 14" diamater?  Are there various hub sizes on the props for
  Mercruisers?  Any advice would be great!
 
  Thanks,