400 with 1.76 transmission prop choices

[larry_arizona]

I know the prop options in 2020 for the 400/1.76 was a 16x17 and 16x15, looks like there is a new option 16x13.9

Anyone running the ACME 3591 16x13.9? Sounds like an absolute stump puller.


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[Cactus371]

I know the prop options in 2020 for the 400/1.76 was a 16x17 and 16x15, looks like there is a new option 16x13.9

Anyone running the ACME 3591 16x13.9? Sounds like an absolute stump puller.


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That’s what I’m running on my SE


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[SONIC]

I run the 16x15 on my 400 with 1.76 and it does fine fully loaded and tops out at 38.

The 13.9 assuming the same prop slip would only drop the top speed to 35 and would likely be significantly torquier down low.
Seems like a good option to me.

[larry_arizona]

35 top speed is plenty, I will order the 16x13.9

The fastest I go is wakeboard speeds 22-23mph


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[Shoebox]

I know the prop options in 2020 for the 400/1.76 was a 16x17 and 16x15, looks like there is a new option 16x13.9

Anyone running the ACME 3591 16x13.9? Sounds like an absolute stump puller.


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I have the 16x15, and have considered trying the 16x17. There are no issues launching, but the rpms are a little higher at surf and wakeboard speeds. Anything taller would be nuts.

[larry_arizona]

I have the 16x15, and have considered trying the 16x17. There are no issues launching, but the rpms are a little higher at surf and wakeboard speeds. Anything taller would be nuts.

What RPM does the 16x15 give at wake and surf speeds?


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[Shoebox]

What RPM does the 16x15 give at wake and surf speeds?


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Full ballast surfing 11.2-11.4 I'm about 3700-3800 rpm, with lead and maybe a little water ballast at 22 is about the same. I do have the 450 though.

[SONIC]

@Shoebox what's your drive ratio?

I'm 1.76 : 1 and run about 3200-3400 at surf speed on the 16x15 prop full ballast

[Stazi]

That’s nice and low for Rpm’s


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[larry_arizona]

@Shoebox what's your drive ratio?

I'm 1.76 : 1 and run about 3200-3400 at surf speed on the 16x15 prop full ballast

Curious how much RPM would increase with the 16x13.9?


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