Jim--THe boat I'm lookinig at has a 3 blade prop that is 5 x 7.05. It was also put on to replace a two blade, for the same reasons that youwere given. What my surveyor found was that with the three blade the boat still didn't seem to have the speed he expected. Do you happen to know the size...
I am trying to buy a 1975 Ericson 32 with an Atomic 4 30hp engine. Speed under power is not what it should be and my surveyor questions the choice of propellor. Does anyone have a view about what the correct propellor choice is for this boat/engine combo. Help! Thanks, Paul