. IveI'got a1994 scarab sprint 18. It's got a mercruiser 3.0 alpha with an alpha one outdrive. Not sure if it's the original or correct outdrive but the p.o mentioned he replaced it or rebuilt it.i just got the boat and it had no prop on it so I have no base line.i have 2 Quicksilver black diamond aluminium props.
A j 14 x23p wot 4800rpm I get 40 mph
With that prop @3600 rpmrI get 29mph(gps). Kinda studders on the acceleration out of the hole for a second or 2 but gets on plane quick enough.
So I switched to a Quicksilver black diamond
J14.25x21p and I get wot 5200rpm 38mph 3600rpm and 25 mph. no hesitatiom out of the hole and up onn plane in about the same time maybe slightly quicker.
Im looking to find a prop for top end speed I don't do watersports or anything just run the boat straight 5 miles or so to diff restaurants bars. So I'd like to get the boat fastest top end with out killing the motor. Once I get the right diameter and pitch I will get a ss prop or something nice.
I don't know the correct diameter or pitch and the prop calculators i used I don't have all the info, and the selections are all over the place.
Maybe the boats just under powered and I'm gonna have to live with the 29mph? These boats came with the 4.3 or 3.0 iv read people saying the 3.0 should get to 50mph?
A j 14 x23p wot 4800rpm I get 40 mph
With that prop @3600 rpmrI get 29mph(gps). Kinda studders on the acceleration out of the hole for a second or 2 but gets on plane quick enough.
So I switched to a Quicksilver black diamond
J14.25x21p and I get wot 5200rpm 38mph 3600rpm and 25 mph. no hesitatiom out of the hole and up onn plane in about the same time maybe slightly quicker.
Im looking to find a prop for top end speed I don't do watersports or anything just run the boat straight 5 miles or so to diff restaurants bars. So I'd like to get the boat fastest top end with out killing the motor. Once I get the right diameter and pitch I will get a ss prop or something nice.
I don't know the correct diameter or pitch and the prop calculators i used I don't have all the info, and the selections are all over the place.
Maybe the boats just under powered and I'm gonna have to live with the 29mph? These boats came with the 4.3 or 3.0 iv read people saying the 3.0 should get to 50mph?