Prop?

How can I tell which prop my motor has?

Look around the prop for a model number. It may be stamped on the outside, or inside the hub. Using the model number, you might be able to do an internet search for the prop specs. If you are lucky, the diameter and pitch will be written right on the prop. If you are not lucky, you may have to remove the prop to find the numbers, or they might not be there at all. Takes all of 5 minutes to change a prop though, really not a big deal. I've attached a few pics to demonstrate what I'm talking about.

Thanks, I have a G3 PF165 with F9.9. Boat to heavy but we have lakes with HP limits. I was trying to see if I could get an extra MPH or 2. Runs about 8 mph now