Correct Prop?

[sal3030]

Hello,
I have a 4.3Litre 175hp Mercruiser with an Alpha One Gen One 1.84R on my 18 foot 1989 Celebrity. I banged up the prop today and ordered an new one from Iboats.

I ordered a Turning Point Hustler Alum 14-1/4x23 with hub kit. (H-1423) I hope my edjucated guess it right in picking that one. From what I can measure it looks like the old one was a 13.5-14 diameter.
Thanks,
I already ordered it....
Sal

 

[Rocky_Road]

Re: Correct Prop?

Your diameter should do fine...but, how did you determine the pitch?

Are you going by your old one? The real answer will be your WOT rpm's, using a load similiar to what you normally run.

For instance: a plain Jane OEM aluminum 23" prop would probably be best replaced with a 21" newer styled progressive pitched prop. Reason is that the progressive pitching of a 21" gives you a useable pitch range of 19" to 23", depending on the load demands at the moment. Without researcing the Hustler, can you tell us if this is a progressive pitched prop?

 

[craze1cars]

Re: Correct Prop?

Diameter is essentially a meaningless dimension and won't help you get the correct prop.

23 sounds like a lot of pitch for a boat like that. Was your old prop a 23 pitch?

 

[sal3030]

Re: Correct Prop?

I used the "wizard" on the TP website. The only thing I had to kind of guess at was the fuel question. I tried a few and the 1423 kept coming back.

 

[sal3030]

Re: Correct Prop?

Oh yeah, I also put in 2 people in the wizard. I am only going to be out by myself, maybe with a friend. Or with my wife and 2yr old and 5yr old. No water skiing.

 

[Rocky_Road]

Re: Correct Prop?

Sounds like you are on the right track.

Let us know how your WOT rpm's turn out...that will be the real answer.

Happy boating!

 

[sal3030]

Re: Correct Prop?

I use the boat on the lake and it has 45mph speed limit. I have not pushed to WOT and been going 30-35. My RPMs have been around 3k.

 

[Rocky_Road]

Re: Correct Prop?

I use the boat on the lake and it has 45mph speed limit. I have not pushed to WOT and been going 30-35. My RPMs have been around 3k.

Your max rpm's are "4400-4800".

You should be able to get there without breaking any laws...assuming that you have the space!

Happy boating!

 

[sal3030]

Re: Correct Prop?

I am sure you are right ! Thanks for the clarification.
Sal

 

[craze1cars]

Re: Correct Prop?

FWIW their prop wizard recommends a 23 for my boat as well. It was wrong. My boat could NEVER push a 23. Mine needed a 20.

Do they permit propeller exchange if you selected too high of a pitch?

 

[sal3030]

Re: Correct Prop?

Oh great ! I don't know. Is your boat similar to mine?
Sal

 

[90stingray]

Re: Correct Prop?

I run a 4 blade 17p on my 4.3 17 footer. Get about 45mph at 4800rpm. The 23 is prolly going to be too much prop...

 

[solmate]

Re: Correct Prop?

I have a 1993 celebrity w a 4.3 v6 alpha one, had a 23 pitch 3 prop horrible hole shot top speed 48mph at 4400 rpm, changed to 21 pitch better hole shot & running 46mph at 4700 rpm hope this helps