<2B701466> I have a 2020 1980 Vexus with a slidmaster jackplate and a 150 4 stroke Pro XS. My friend has a 2019 1980 Vexus with a regular 150 merc 4 stroke. His boat is absolutely faster than mine. After not really being able to get any good answers I found a tool that calculates speed as per prop pitch, gear ratio and slip. This is what it came up with:
MERC 150 4 STROKE:
RPM: 5800
Gear ratio: 1.92
Pitch: 23
Slip: 0.15
Speed: 55.9
MERC 150 4 STROKE PRO XS:
RPM: 6000
Gear ratio: 2.08
Pitch: 23
Slip: 0.15
Speed: 53.4
These boats are shipped out with the exact same Tempest Plus 23P props. Looks like the Pro XS is slower according to the calculator and it sure as heck is in real life. The fastest I've gotten mine going is 50 mph gps speed. My friend has gotten his to touch 58 mph gps. In both cases we were in the boats alone. But my boat also has a jackplate his does not.
Did Mercury actually make a Pro XS that is slower than the regular? Or should the props be different or what?
I would sure appreciate any feedback!