Mercury mark 20 propellers

[Brashboards]

So I have recently acquired a mercury mark 20 and I have a bunch of propellers that look like it goes with it I wanted to know what each propeller does I’m looking for speed there’s the original propeller it came with the smooth blade that looks like the original but has distinct blades and I have a three blade

[dave-bernard]

got pics? there is a mark 20 prop BUT the mark 15 25 30 props and fit. use what works best.

[Brashboards]

Here is that photo

[dave-bernard]

bottom is Mark 20 middle is Mark 25 30 top is lower pitch for all 3

[Brashboards]

By just the looks of it it seems like the Mark 25 has less drag than the mark 20 would that give me more speed because they have just about the same pitch?

 

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