picking a prop light moderate to heavy load?

[OddballNo3]

I have a 12' Avon that I just bought a new tohatsu 30d for. I didn't realize it doesn't come with a prop. on the Tohatsu website they list propellers but list light moderate and heavy load, what exactly does that correlate to? the boat is a rigid, and we're looking to carry around 6-700lbs with us included. I'd like it to have a higher top end speed. how do I figure out what prop i need when I have none?

[Pikey Dave]

I’d say 6-700lb in a 12’ boat falls well within the heavy category.

[OddballNo3]

so what's considered light? two Americans hit the 400 mark pretty easy, there has to be like a percentage chart or something. I'd like to go fast but we also want to load our lil boat with camp gear (within reason lol) also, comparing aftermarket props to tohatsu oe and they all seem to be a bigger diameter than what tohatsu's are why is that? and won't that bog down my rpms?