Quote:
Originally Posted by Bigshrimpin
I do agree that the smaller diameter props seem a little friendlier on the 20 seacraft.
GOS's 1993 200 is a 2.5L. I've run both a 15P x 15.75" diameter mirage and 15.5" x 17P Mirage Plus on my 2.4L. They do work great even on 30+ year old 2.4L merc's!!
Unless I am mistaken the Mercury Enertia ECO prop is 16" in diameter.
The reason I say 16" is too big for the Mercury 2.4 and 2.5L lower Units is that I originally bought a 13P 16" blackmax prop thinking that would be the prop for a 175hp pushing a 23 seacraft. There was major cavitation/vibration issues no matter what the engine height was set too. The blades from the 16" Blackmax prop barely cleared the cavitation plate on both 2.4L and 2.5L lower units. The 15.75" x 15P Mirage was fine running at the same height where the brand new 16" diameter x 13P blackmax prop had issues.
I am fairly certain the 16" Enertia ECO will give you the same problem on 2.4 and 2.5L mercs (enough that I wouldn't make a $700 gamble), but I could be wrong . . . I can tell you the older 14.5" diameter 17P enertia works great and that's what I run now on my 175 2.4L pushing a 23.
https://www.youtube.com/watch?v=jg7cdv1w1vE |
I cant find the info now but if my memory services me correct I read a report done a while back that showed the 17P Enertia vs the Enertia Eco and there was little gained. If I remember right the Standard Enertia out preformed the Eco in every category except on mileage and even that was a minimum gain. In the Eco line up the 17p was one of the last size props to come out due to mercury could not improve on it to get any better performance to make it worth producing. Due to the demand for it they made it any how but most were not happy with the Eco in 17p and say the standard Enertia is better in the way it preformed. But the eco is a completely different prop than the standard and not sure why mercury used the same name but they would be in two different classes in my mind. I think that the eco props do good on big twin cc's that make long runs offshore, with 10% better fuel burn a 50 mile one way trip out to the fishing grounds like here in NC, you will see the difference when you re-fuel. I don't think many liked the 17p and had good luck with that size eco but Now in the 19p and up, that's a different story...