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devilray snob
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There is no way you're going to gain 5mph by propping correctly, and there is no way you're going to do 28mph on a shadowcast with a 20hp.

You are right about the correct speed for that boat/outboard. You MIGHT be able to hit 24-25 with a jack plate and perfectly cupped/pitched prop.
 

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I Love microskiff.com!
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41 Posts
Discussion Starter · #4 ·
There is no way you're going to gain 5mph by propping correctly, and there is no way you're going to do 28mph on a shadowcast with a 20hp.

You are right about the correct speed for that boat/outboard. You MIGHT be able to hit 24-25 with a jack plate and perfectly cupped/pitched prop.
Unless my GPS is wrong we hit 24 mph with a stock prop and full tank with my dad (180) and myself (165).
 

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devilray snob
Joined
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2,387 Posts
There is no way you're going to gain 5mph by propping correctly, and there is no way you're going to do 28mph on a shadowcast with a 20hp.

You are right about the correct speed for that boat/outboard. You MIGHT be able to hit 24-25 with a jack plate and perfectly cupped/pitched prop.
Unless my GPS is wrong we hit 24 mph with a stock prop and full tank with my dad (180) and myself (165).
It may very well be correct. You're initial post was saying that you want an extra 5MPH by propping...not what your current speed is.
 
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