I know props differ in pitch but how does this pitch affect the boat? Does a higher number of the pitch make the boat go faster or slower at the same rpm as a lower number pitch? Reason I'm asking this is I replaced a 17 degree 3 bladed with a 19 degree pitch 3 bladed. The guy I bought it from said that I'd have to be careful not to over rev the engine with the 19. Don't really understand that statement to much. Would putting on a different pitch prop make the engine put out more rpm's? I don't usually push the throttle all the way forward anyway but thought I'd ask these questions. Thanx for any inputs.