Four winns 5.0gxi prop Stiletto or OEM Volvo penta

[Dhadley]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

Did you ever figure out why there's a 1" gap between the prop and the drive?

 

[volvomia]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

Did you ever figure out why there's a 1" gap between the prop and the drive?

Ye the Prop was not installed properly. I did it my self after my neighbor did it and i tried the boat again. He used the old washer as he said the new one is too big and he could not tight the nut. He simply did not install the hub all the way inside the prop. No luck still slow

 

[volvomia]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

Good news. I talked to Stiletto manufacture and they will exchange it for me. Before i do it i will get a aluminum and test the rpm. I think to go from 4 blade 14 1/4 x20 Bay PRO to 3 blade advantage II 14 1/4 x19. i will first test with the Aluminum 14.5x19 ( OEM ) and make sure i can hit 5000rpm. They said going to SS should drop only 100rpm.

 

[Dhadley]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

Just to clarify, did you get a Bay Pro II or a Bay Pro III? What are the exact numbers on the prop?

 

[volvomia]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

Just to clarify, did you get a Bay Pro II or a Bay Pro III? What are the exact numbers on the prop?

For the SX outdrive you can get only Bay PRO II and i got 14 1/4x20 4 blade. Since i dropped 600-800 rpm compared to 14 1/2x19 3 blade OEM Aluminum i wonder what should i exchange it for. Looks like Stiletto are dropping more RPM then other props. I do not think going for 14 1/4x18 4blade will help enough. Looks like if i opt for the OEM like size 14 1/4 x19 SS advantage II 3 blade will not be enough as well as i might need to go to 14 1/4 x17. I am waiting for my OEM aluminum to arrive and the i should be able to make more educated guess.

 

[Dhadley]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

The Bay Pro II should be 14 x 20. The Bay Pro IIIs are 14 1/4 diameter and are (for now) in odd number pitches. Which did you get?

 

[volvomia]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

The Bay Pro II should be 14 x 20. The Bay Pro IIIs are 14 1/4 diameter and are (for now) in odd number pitches. Which did you get?

According to the website i did get the Bay Pro II with 14 1/4 x20. According to iboat website is 14x20. The Prop has this numbers on it : E805420. I was able to get with it up to 4200rpm. I do have barnicles on the boat as well so i guess that slowed me down a bit as well. Do you think the stiletto 3 blade 14 1/14 X 19 will get me to 4800 at least ? I am waiting for my aluminum to arrive as well. I might clean te boat and run it then.

 

[Dhadley]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

Let's look at what you have. A Bay Pro II is not 14 1/4" diameter, it's a 14" diameter. What diameter is the Stiletto 4 blade prop you got?

 

[volvomia]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

Let's look at what you have. A Bay Pro II is not 14 1/4" diameter, it's a 14" diameter. What diameter is the Stiletto 4 blade prop you got?

Like i said depend on the website you are looking at. In the receipt it say Bay Pro II. The site i got it from has it listed like 14 1/4. Iboats have it as 14. The number that i gave you E805420 is the same as the one on Iboats. I measured the diameter and t is 14 1/4. I just checked another website and Bay Pro III comes only with odd number pitch. Mine is even number pitch or X20. So it has to be Bay Pro II. I have to check the difference between these Pro II and Pro III

 

[Dhadley]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

The old Bay Pro IIs were mistakenly boxed as 14 1/4" diameter and had the old rubber cushion pressed in hubs. They are actually 14" diameter, perhaps a 1/16" more but not 14 1/4". The newer Bay Pros all are square bore meaning they require a Guardian or Flo Torq hub kit for whatever motor you are putting it on.

If yours did not require a hub kit then it's old stock. If it requires a hub kit it's newer stock and is closer to 14" diamerter.

No prop will act right with barnicles on the bottom. Don't consider any tests valid until the bottom has been cleaned.

 

[volvomia]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

The old Bay Pro IIs were mistakenly boxed as 14 1/4" diameter and had the old rubber cushion pressed in hubs. They are actually 14" diameter, perhaps a 1/16" more but not 14 1/4". The newer Bay Pros all are square bore meaning they require a Guardian or Flo Torq hub kit for whatever motor you are putting it on.

If yours did not require a hub kit then it's old stock. If it requires a hub kit it's newer stock and is closer to 14" diamerter.

No prop will act right with barnicles on the bottom. Don't consider any tests valid until the bottom has been cleaned.

My Prop did came with a HUB.
I will clean the boat this weekend. I need to exchange this prop soon I guess i am not sure how long before they say that is too late to change so if you have to pick knowing my RPM lost is about 600-800rpm going to the Bay Pro II x20 from my Volvo aluminum 14 1/2x19 should i get the 4blade bay Pro II in 18 pitch , 4 blade Bay Pro III with 17 pitch, 3 blade Advantage in x19 pitch or the 3 blade Advantage in 17 pitch? All are SS props.

Thank you

 

[Dhadley]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

If the Bay Pro II had too much bite then the Bay Pro III will really have too much. If it were me I'd stay with the BP II. However, we really don't know the full potiental of the BP II since the test was done with the extra bottom passangers (barnicles).

Have you sent the BP II back yet?

 

[volvomia]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

Not yet because i am waiting for my original Aluminum Prop that i ordered last week. I spoke with Steve from Stiletto and he Also advised me to move to x18 pitch same Bay Pro II. He said i can test the boat once i clean it and get the original prop ON and he will exchange it when i am ready. Talking about customer service These guys really look after there customers. A++++. He also mentioned that RPM drop even more once the engine is out of the efficient range. So let's say you drop 400rpm due to 2 pitch up once out of the efficient range they will drop even more so 2 pitch my drop even 600rpm. Plus out of the range the engine has no torque to spin the RPM's up. He said for 5.0L and 5.7L with 1.6 gear ratio customers are getting the 18pitch Bay Pro II or Advantage II in 19 pitch.

 

[volvomia]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

Today i took the boat to the Marina for scheduled maintenance new bottom paint and my new Volvo Penta OEM Prop to get installed. I will have it back by Friday night- Saturday morning. I will post results. Excited )

 

[volvomia]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

Finally the boat was ready today. New bottom paint, new oil and new OEM propeller 3X14.5X19 aluminum. I was able to get it up to 4900RPM reaching 45.5 MPH alone in the boat on a short intracoastal straight so i think 5000RPM will be hit with the right condition which is my Maximum. SO now is time to replace my stiletto Bay Pro II 4X14 1/4 X20. I think SS 3 blade advantage 3X 14 1/4 X19 will loose me no more then 200RPM or the SS Stiletto Bay Pro II 4X 14 1/4 X 18 which i have no Idea how much RPM i will loose. Suggestions ?

 

[Dhadley]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

How about trying the 14 x 20 BP II you have? You mentioned a BP II at 14 1/4" diameter but they are 14". The BP III is 14 1/4" diameter but that's not what I'd suggest in this case.

 

[superpop]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

You are going to gain RPM's not lose, going from a 20P to a 19P or 18P. If you are at your top end RPM with a 19P prop, that is probably the right prop for the boat. You can go to a 20P and lose some holeshot if you want more top speed. I have the Solas Titan, 18P stainless 4 blade on my 2006 Chaparral with the same drive package as yours and it leaps out of the water but it is a dog on the top speed, maybe 40MPH max. I do not want to go fast though. I would guess with a full tank of gas I am at around 4200 pounds though.

 

[volvomia]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

You are going to gain RPM's not lose, going from a 20P to a 19P or 18P. If you are at your top end RPM with a 19P prop, that is probably the right prop for the boat. You can go to a 20P and lose some holeshot if you want more top speed. I have the Solas Titan, 18P stainless 4 blade on my 2006 Chaparral with the same drive package as yours and it leaps out of the water but it is a dog on the top speed, maybe 40MPH max. I do not want to go fast though. I would guess with a full tank of gas I am at around 4200 pounds though.

I have 19P Aluminum so going to 19P SS will loose Rpm and then Stiletto is also a bit more cupped as well. I guess i can try the 4 Blade 20P that i have before i exchange it. I think that will get me down to 4500RPM and that is too low for me. I like the Top end of a 3 Blade so that might be the deciding factor

 

[Tail_Gunner]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

I have 19P Aluminum so going to 19P SS will loose Rpm and then Stiletto is also a bit more cupped as well. I guess i can try the 4 Blade 20P that i have before i exchange it. I think that will get me down to 4500RPM and that is too low for me. I like the Top end of a 3 Blade so that might be the deciding factor

There ya go test the 20..A few things to know. The Baypro's will give you quite a bit of lift that is literally lift your hull out of the water..when that happens you have less drag going on...It is very possible that the BayPro 11 while larger in pitch may very well lift the boat high enough out of the water creating less resistance and allow the engine to turn to 4900..

I seen this before on a 19' boat which weighs 3500 sitting on a 20degree hull. The orignal prop was a 19 3 blade alum and a volvo in a flat out run on calm water it would run 50mph @ 4950. If you payed very close attention you could hear the rev limiter occasionally clip the motor almost imperceptable..but it was there.

After the Baypro 11 was installed it would do 54 @ 4800 and now that the motor is broken in it reaches 56.7 and again its banging the rev limiter at WOT on smooth water. Nice speed gain there but one big differnce was how high the new prop lifted the boat out of the water..It was riding so high it chine walked @ 55 that is the boat was balanced on the very back of hull and would rock side to side..left right left right etc.

A three blade will not do that nor will the Baypro 111 its not designed to lift like the 11..The reason for DH trying to determine just what 4 blade prop you have ...you see its all about lift or how the boat balances.

I will say this though about the 11's it seems that when the boat is a shallower v or over 4500lbs they cannot create enough lift to get the boat out of the water enough to be really effective..

From my experinces if the 20 can reach 4400 then a 18 would be effective aka i had a 22 that would do 4400 and the 20 hit 4900 53mph vs 55 if i remeber correctly. Good luck

 

[volvomia]

Re: Four winns 5.0gxi prop Stiletto or OEM Volvo penta

Today i did install back the BP II 14x20 4 blade and run the boat again. This is what happen. Top RPM went to 4250 after the boat was serviced. Speed went up to 43.5mph. Hole shot was slightly slower then my OEM 14.5X19 3 blade aluminum. Idle speed went up by 1mph as well. While this numbers are not bad the engine is out of the recommended RPM. Then i put back my OEM prop and run the boat again.RPM reached 5000 as per manufacture recommendation and speed went up to 46.5MPH. I think i will switch to SS Advantage II 19P. BP II 14X18 4 blade will lower my top speed even more while the whole shot probably would be awesome. I think the SS Advantage II in 19P will lower my RPM just a bit but give me extra top speed that i prefer.

Thanks again for all the input given me by the many resourceful members on this site