I have a 1991 Ranger 361v with a 150 Mercury XR4. It has a 6 inch jackplate. It is set to 3.5 inches above the pad. The way I understand was they came with a small gearcase and 1.78 gears. Lower unit went out . I replaced with a larger gearcase 1.87 gears (was advised that the Mercury had problems with durability on smaller case on the 150). Tried the old prop (23p Turbo) and and did not get the numbers I was getting (63mph) good handling and cruising and acceleration. Several of the lakes I fish have bends in them that prevent you from going wot. So handling and cruising performance are important.

Current numbers (GPS speed)

23p Turbo 58mph@wot 6150rpm on larger gearcase (small gearcase prop)

23p Tempest Plus 60.5@wot 5900rpm (cruising performance not so good)

24p Tempest Plus 60.8@wot 5650rpm (cruising performance not so good)

Was told by local Ranger dealership that my rpm range is 5500-5800.

Where do I go from here? Hole shot has been good for all three. Thought about 24p trophy or a 24p Fury. Maybe I should go back to a 23p Turbo for the large gearcase.

I have exhausted all props that I could borrow. Know any places that do loaners in London, KY area?

Thanks for the help.

Zach

I would try a 24" Powertech TRO4 and then the Fury.  

Good luck!

is it 3.5 above the pad or below the pad and I think the 24p fury would be too much for you to turn, Merc told me to drop down a size when going to a fury. I went from a 25p tempest plus @5800 to a 24p fury at same rpms on a 200hp

I agree that you will not likely be able to turn a 24 Fury if you can only turn a 24 Tempest at 5650. I believe the ideal rpm range for your motor is 5600-5850. Definately wouldnt run the 23 Turbo @6150 rpms unless you want to replace your powerhead soon. That's way too many rpms for that motor.