Raptor 575 prop options

[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?