Raptor 575 prop options

[Prospersigman]

So I dinged my Acme 2247 (15.00 X 14.25) on my 2018 SL550 and want to get a replacement and then repair the 2247 and keep it as a backup.

We are in Texas so elevation is not a factor. We only surf and I have 1000lbs of lead in the SL. Surf RPMs full loaded with stock ballast 3500lbs and 1000lbs of lead with medium size crew is 3500-3600rpm.

Anyone have the 575 and upgraded the prop?

[Holdmybeer]

I know the new Supra props are 16 inch and even the new Moomba boats come with 15.5 inch props.

Any room to go bigger? The newer 16x13.9 prop that come on the Supra with the 1.7 transmission everyone likes. Not sure what it would do on your 575 engine with 1.5 trans. Assuming less slip from the bigger prop you should drop 200-ish RPM when surfing, but you will lose some top end if you try any skiing on that thing.

[larry_arizona]

Not sure who you are using to repair, but I went through nettles and they are kinda a scam.

Great price on new props, they give you a $50 coupon to repair your prop if you ship it to them.

They quote the repair only upon receiving it.

I had a minor ding on one blade and quote was $310 shipped and that included the $50 off.
https://uploads.tapatalk-cdn.com/20210922/9e26288bd25de77579950e50840727d9.jpg

Might get it back by mid November.

Summary, great price on new prop, but they get it back in the prop repair.


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[SONIC]

Not sure who you are using to repair, but I went through nettles and they are kinda a scam.

Great price on new props, they give you a $50 coupon to repair your prop if you ship it to them.

They quote the repair only upon receiving it.

I had a minor ding on one blade and quote was $310 shipped and that included the $50 off.
https://uploads.tapatalk-cdn.com/20210922/9e26288bd25de77579950e50840727d9.jpg

Might get it back by mid November.

Summary, great price on new prop, but they get it back in the prop repair.


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I found out the same thing, I have bought probably 6 or 8 props from them over the years but when I got a quote for repair it was well over double most other places pricing.

[larry_arizona]

Live and learn, by the time I pay to have it shipped back and pay for local repair it’s just worth it to have them finish it.


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[Prospersigman]

My dealer is using a local prop repair shop in the DFW area for the repairs.

I am still interested in hearing from other 575 owners who have changed from the Acme 2247 and what their experience was.

[larry_arizona]

Have you considered jumping up to a 16” prop?

2022 builder lists the 16” props for the 575/1.5 combo.

The builder may be wrong because I swear the 575 is coming with the 1.7 trans this year:


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[TXSurf4]

Have you considered jumping up to a 16” prop?

2022 builder lists the 16” props for the 575/1.5 combo.

The builder may be wrong because I swear the 575 is coming with the 1.7 trans this year:


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I am pretty sure the builder is wrong. I think I remember Drew telling us it was coming with the 1.7 for 2022.

[Prospersigman]

Response from Wakemakers...thoughts?

"Going UP in propeller pitch is going to help lower RPMS and help with that fuel consumption. However, you will notice a change in whole shot performance. Something like the OJ 925 would help with that.

Unfortunately, we are very limited on available 15" propellers with a higher than 14" of pitch at this time. A "special order" prop such as the OJ 925 is a better option at this point in the year for getting a propeller sooner, rather than waiting for our ACME shipment that wont ship until October. "

[Prospersigman]

OJ WakePro V3 925 4 Blade 15" x 16.25" compared to the factory prop I currently have ACME 2247 4 Blade 15" x 14.25".

[TXSurf4]

Response from Wakemakers...thoughts?

"Going UP in propeller pitch is going to help lower RPMS and help with that fuel consumption. However, you will notice a change in whole shot performance. Something like the OJ 925 would help with that.

Unfortunately, we are very limited on available 15" propellers with a higher than 14" of pitch at this time. A "special order" prop such as the OJ 925 is a better option at this point in the year for getting a propeller sooner, rather than waiting for our ACME shipment that wont ship until October. "

When you say upgrade your prop with the 575 what are you looking to accomplish? Higher top speed, Lower RPMs for surfing?

[Prospersigman]

Looking to lower RPMs if possible and save on fuel consumption.

Currently, surf RPMs fully loaded with stock ballast 3500lbs and 1000lbs of lead with medium size crew is 3500-3600rpm running 11.2-11.5mph.

[larry_arizona]

Looking to lower RPMs if possible and save on fuel consumption.

Currently, surf RPMs fully loaded with stock ballast 3500lbs and 1000lbs of lead with medium size crew is 3500-3600rpm running 11.2-11.5mph.

Do the 575’s have a boost gage?

Curious what boost levels are at fully loaded surf speeds.

I think ideally you want boost to get to your set speed quickly and then be out of boost as you surf at 11mph or wakeboard at 22 for example.


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[MJHSupra]

OJ WakePro V3 925 4 Blade 15" x 16.25" compared to the factory prop I currently have ACME 2247 4 Blade 15" x 14.25".


OJ WakePro V3 925 4 Blade 15" x 16.25" compared to the factory prop I currently have ACME 2247 4 Blade 15" x 14.25".

My buddy has the 575 and I think he runs the 15 x 14.25. I will ask if he tried other props.


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[Holdmybeer]

I know this is not the typical place to buy a prop. I'm not promoting or advertising for them in any way. I did order my prop, OJ 945, with hard case remover kit. All in they shipped it to me for under $700 earlier this year.

They have since changed prices to fit the covid economy but still a hell of a deal.

https://www.boatownersworld.com/oj-wakepro-v-3-4-blade-propeller-taper.html

I would recommend the OJ 948 (15x14) for your 575 motor. Similar to what you have now, I know OJ and ACME are different, but you can order with the soft case and puller kit for $759 shipped to your door. Took them 2 weeks to get it to me. I now have my ACME 1235 in the kit as a backup.

[TXSurf4]

Looking to lower RPMs if possible and save on fuel consumption.

Currently, surf RPMs fully loaded with stock ballast 3500lbs and 1000lbs of lead with medium size crew is 3500-3600rpm running 11.2-11.5mph.

Have you called and spoken to anyone at ACME about this? I had great luck in calling as their customer service was great! Once they recommend a few just buy it wherever you can get it cheapest. You definitely want to go up in pitch as stated to lower RPMs but you don't want to go to high as it can begin to struggle to hold surf speed. I assume with the 575 this might be less of a problem.

[Prospersigman]

The 575 does not have a boost gauge, but when you are pulling a surfer up you can audibly hear the whine of the blower as it gets up to surf speed then the blower whine is barely noticeable once it reaches 11.2-11.5. Not sure I can expect to really lower my RPMs since they are 3500-3600 at surf speed. I don't have any problem maintaining/holding surf speed with the Acme 2247 now, I was just thinking if I am going to buy another prop why not find out if there was something more efficient currently being offered.

[larry_arizona]

The 575 does not have a boost gauge, but when you are pulling a surfer up you can audibly hear the whine of the blower as it gets up to surf speed then the blower whine is barely noticeable once it reaches 11.2-11.5. Not sure I can expect to really lower my RPMs since they are 3500-3600 at surf speed. I don't have any problem maintaining/holding surf speed with the Acme 2247 now, I was just thinking if I am going to buy another prop why not find out if there was something more efficient currently being offered.

Without a gage you may not be able to fully understand if lowering RPM’s will help fuel consumption.

Me personally, I would add a manual boost gage to understand when the blower bypass valve opens up.


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[Cactus371]

I’m running 16x12.5 on my 2021 se 550. I’m also running 1600 in lead.


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[TXSurf4]

I’m running 16x12.5 on my 2021 se 550. I’m also running 1600 in lead.


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Do you have any gel burn?


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[larry_arizona]

I don’t think the 1.5 trans has any different prop shaft angle or length than the 1.76 trans.

The newer Supra 400/450’s have used 16” props with plenty of hull clearance for a few years.


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[Cactus371]

It came from factory with 16x13.9


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[larry_arizona]

It came from factory with 16x13.9


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Curious why you dropped down to the 16x12.5. I can’t imagine you were lacking power with the 575 and 16x13.9.


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[Cactus371]

Curious why you dropped down to the 16x12.5. I can’t imagine you were lacking power with the 575 and 16x13.9.


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When I had 10 people and full ballast it was slow to get to 12 when surfing. If I dropped a little ballast it did ok. But with the 12.5 I don’t have any problem


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[TXSurf4]

I don’t think the 1.5 trans has any different prop shaft angle or length than the 1.76 trans.

The newer Supra 400/450’s have used 16” props with plenty of hull clearance for a few years.


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That is interesting. I wonder why it wasn't until Moombas went to the 1.76 that they went with a 15.5" diameter prop. I know in 2019 they all had 15" diameter props with the 1.5 but if you ordered the 450 it came with the 1.76 trans and a 15.5" (at least on the Makai). When did Supra make the jump to a 16" if it wasn't in correlation with the change to the 1.76?

[larry_arizona]

That is interesting. I wonder why it wasn't until Moombas went to the 1.76 that they went with a 15.5" diameter prop. I know in 2019 they all had 15" diameter props with the 1.5 but if you ordered the 450 it came with the 1.76 trans and a 15.5" (at least on the Makai). When did Supra make the jump to a 16" if it wasn't in correlation with the change to the 1.76?

I believe Supras moved to the 16” prop in direct correlation to the 1.76 trans. I think the 575 stuck with the 15” for awhile.

But the prop clearance is there, I think a 16.5” would probably fit.

For some reason, there is less prop clearance on the Moombas.


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[TXSurf4]

I believe Supras moved to the 16” prop in direct correlation to the 1.76 trans. I think the 575 stuck with the 15” for awhile.

But the prop clearance is there, I think a 16.5” would probably fit.

For some reason, there is less prop clearance on the Moombas.


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Ya IIRC the 575 just went to the 1.7 trans this year. I wonder why SC didn't run 16" props stock back then if they had the clearance. I guess the only reason the Supras are able to run the 16" and the Moomba can't has to do with the hull design around the prop.

[larry_arizona]

Ya IIRC the 575 just went to the 1.7 trans this year. I wonder why SC didn't run 16" props stock back then if they had the clearance. I guess the only reason the Supras are able to run the 16" and the Moomba can't has to do with the hull design around the prop.

My guess is when Supra codeveloped the 16x13.9 with acme, they tested it on the 575/1.5 and added it to the builder.

No question a 575/1.5 can turn that prop and OMG the 575/1.7 will be beast mode.


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[TXSurf4]

OMG the 575/1.7 will be beast mode.


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I couldn't agree more!

[Prospersigman]

I am going to order the 16x13.9 prop and see how it runs on my 2018 575 with the 1.5 tranny.

Should I be concerned for any gelcoat burn is the question?

[larry_arizona]

I am going to order the 16x13.9 prop and see how it runs on my 2018 575 with the 1.5 tranny.

Should I be concerned for any gelcoat burn is the question?

Measure your current prop clearance. I can tell you the current Gen SA with a 16” prop has .75” prop clearance with no concern of prop burn.


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[Prospersigman]

Cool, will do this weekend!

[larry_arizona]

Remeasured……

Used foam block and let blade cut into foam.
https://uploads.tapatalk-cdn.com/20210928/a8fbd85afbd19ae01e315e9823b9353d.jpg
https://uploads.tapatalk-cdn.com/20210928/454ad0d503e9032c3a0d0fb259a1927a.jpg


https://uploads.tapatalk-cdn.com/20210928/fa37ad66e8bac4d36ff23a0add10db5c.jpg
1.01 inch clearance.

Don’t mind my dogs toys in the background lol.


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[MJHSupra]

One inch sounds right. I think I recall some from SC talking about the number.


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