What prop do I need

[Julie Kirby]

We have a 2009 Rinker Captiva 19.2. It has a 4.3 Mercury, it runs out at about 48 mph and 4800. It is slow slow slow getting out of the water and up on plain. It has a 3 blade prop. Does anyone know what size prop is best for these boats to get up and out of the water and on plain. I realize I will loose some top end speed but with 4 people in it it takes forever to get up on plain. Does anyone have a remedy for this, thanks

 

[Starcraft5834]

4 blade prop will improve your hole shot.. based on your current performance numbers. The prop pitch you now have seems good. Get a 4 blade in same pitch...Solas Amita in 4 blade would perform well

 

[Starcraft5834]

Look at your prop. Around the collar numbers are stamped there...your prop pitch is there..its usually a model # followed perhaps by a dash then say 19...or 21. That would be pitch

 

[Julie Kirby]

It is a 21 prop

 

[Chris1956]

Julie, Your top speed is excellent for that boat/motor combination. If you want to improve low speed performance you will need to change to a 19" pitch ( or lower) prop. You will lose some top speed, and you will need to watch your max RPMs. Are you sure your tachometer is correct? It seems a bit high to me.

 

[steelespike]

You might consider the Mercury Spitfire prop In the same pitch. It is said to improve performance without sacrificing top speed.

 

[dazk14]

Which 4.3 motor do you have (read HP)?

A non injected 4.3(carbed), is a dog with a 21" pitch, but they constantly come stock, because with a non-existent load they'll show best top speed - but not normally 4800.

 

[Chris1956]

Gee, I ran a 4.3LX (205HP, 4bbl carb) with a 21"P Rapture. It was not a dog out of the hole, and I could get about 42MPH with it.

Julie's boat would appear to be a bit larger and heavier than mine, hence the 19P suggestion.