Need help choosing the right prop
Hi there,My mercury 2 stroke 3 cyl. 80 HP needs a new prop, it has a current SS
prop 3 blades 13,5" 19p. He's doing 5000 RPM at about 38-39 miles on my
fletcher arrowstreak GTO 161. So I was searching on mercury marine on their "prop calculator". My
goal here is to have good allround performance. I found this prop:
Trophy plus 13,75" 19P 48-825932A46, I like the idea of having 4 blades
and therefore better acceleration and less fuel consumption. This prop seems to get good scores on all available choices (acc., top
speed, handling, overall performance, mid handling) but I',m a little
bit scared, my RPM will drop too much... Would this be a good choice for me?
Perhaps anyone knows a better choice for me? thanks,
Foppe |
foppe
Sep 24
2006
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| It's something of a guessing game, but that quarter inch at 19p might
actually drop your RPM up a little. You could certainly entertain testing a 13.5/21p four blade - that
might bring your RPMs up a little into the 52/54k range rather than
swinging the larger diameter prop. I will say this - I went from three blade to a four blade on my E-TEC
and the difference was, well, spectacular to say the least. The boat
the E-TEC was installed on became a whole new boat with that prop.
Well, the new engine helped, but still. It has great forward bite and
gives a lot of bow lift which brings the boat on plane much quicker. The only semi-touchy part is that in sharp maneuvers, you have to be
aware of your trim switch and use it to maintain speed. |
Shortwave
Sep 24
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