No, not what I was thinking.
You are trying to pick a starting point. Finding the right prop is a process. It's possible to find the right one the first time. Certainly you don't want to end up with two or three wrong ones before finding the one or two right ones. Take it from someone with shelves full of mistakes. It's a really cool collection of props...but it's just too many props.
Another mistake I made for years was trusting my 'ear' on rpm. A TinyTach is a great tool. There are other tools too. MAC Tools sells a SmartTach that reads the sparks through an antenna. You don't even have to hook up any wires at all. I used one of these long enough to love the idea, but hate the cheapy tool itself. The meter was cheaply built and delicate...not happy in a tin boat at speed. I went back to the tiny tach, you have to take a minute or two and wire it in before you go out. Works real good if you read and follow directions.
Where you want to wind up:
ONE good fast prop for light to moderate loads, preferably stainless-steel. (my opinion)
A SPARE prop, one size smaller, that you can pop on there for any heavy load condition...or if you wreck your good prop. Aluminum is fine here.
If you are on a budget, and who isn't these days, it's best to borrow a prop for testing purposes. (If you live near MA/CT stop in around Spring) Take a run with the tach using a prop in perfect condition. Beat up props are a waste of time, fuel, and power.
Try a 13P maybe first. Your first try tells you which direction to go in next:
If the boat is sluggish and doesn't come up to 5500rpm, or so, Then look for an 11P. Return the 13P or put it on your shelf.
If the thing screams out of the hole and starts bumping off the rev limiter(around 6100) at top speed, then you want to try a 15P. The 13P can be your SPARE.
Remember to do your initial testing with LIGHTEST possible load. You, boat, motor, tank.
You CAN use a prop that is too small. It makes a good spare and you can always throttle back. It will carry a bigger load. Its easier to sell.
You CANNOT use a prop that is too big. It will make the boat a slug out of the hole. It will over-load/over-heat the engine at speed. It's also harder to sell, works on fewer rigs. It goes on the shelf.
The factory original-equipment prop is always the most widely used prop and therefor it is the easiest to resell if it's not right for your rig.
0175191 PROPELLER 10 X 13 AL (Std. 20,25)