150 Pro XS 4s 2.01 gear ratio?

[Cwash]

I have a 2019 Nitro Z18 with a 150 pro xs 4s. I know the pro xs version of this motor has 200 extra rpm at wot than the regular 150 and a 2.01:1 gear ratio and was curious if anyone knew exactly what that gear ratio gives this motor compared to the regular 150 4s?
I realize higher gear ratio allows for more torque at the prop which helps with holeshot at the cost of top end speed (which the 200 extra rpm helps to negate). My question is could the effects of this gear ratio change have instead been done with just using a different pitch prop?

ie. (negatong prop slip for simplicity)
Pro xs gear ratio 6000rpm/2.01 = 2,985.07 rpm at prop x 23” (for a 23p prop) = 68,656.72 in/min /1,056= 65.02 mph
Regular 1.92gear ratio with the extra 200 rpm from pro xs and a lower 22 pitch prop
6000rpm/1.92 = 3,124.69 rpm at prop x 22” = 67,005.08 in/min /1056 = 65.10 mph


Also I really like the 150 pro xs on my z18! Just curious about what the gear ratio changes to the point that it makes it worth it for Mercury to build this motor with a different gear ratio.

2019 Nitro Z-18
150 4s Pro XS:serial# 2B582108
Fury 23P prop
No jack Plate
WOT 6000 rpm and 60.5 mph by gps

[Cwash]

Realized I was off on the proxs gear ratio and it is actually 2.08, but doesnt really change the original question.

[contium]

I'm curios about the benefit too. I had a 2018 Z185 with the standard Merc 150 4S that ran 60.4 MPH GPS with a 22P Tempest+. My 2019 Z185 with the 150 Pro XS came with a 22P Tempest+ which clearly wasn't enough prop. Ran 54.6 MPH at 6000 RPM. Installed a 23P Tempest+ and now get 56.7 MPH at 6000 RPM. Going to try a 24P Tempest+. But so far, my Pro XS is slower than the regular 150.

[Cwash]

That is quite a difference. Curious to see how that 24p prop does.
Have you noticed any difference in holeshot?

[EuropeanAM]

The lower ratio (high number) and added RPM's will often allow you to swing a higher propeller pitch (which often also opens up a wider array of suitable propellers).

This applies to MOST applications (obviously someone putting this engine on a really light hull could end up pretty high in prop pitch).

[BR374]

I ordered an rt198p be completed 2/12 . I got the 150 pro xs with jackplate and Ranger has selected a 23" tempest. I thought a 24" would have been chosen. You would think the word pro would be faster than the regular 150 4s. Guess not.

[EuropeanAM]

The word "Pro" actually stood for "Production" when the ProXS engine line began.

The folks at Ranger would have done some extensive testing... and even without that I would expect a 23P.

[BR374]

Thanks, I feel better with 23”.