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Discussion Starter · #1 ·
For the experts...

What, EXACTLY, is the setback rule regarding running height? i.e. - how much height can you gain per 'x' inches of setback?
 

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No exact measurement RK.
Every hull is different.
Every hull is loaded differently.
That's the reason for jack plates.
They are adjustable in small increments.
Trial and error to find the best setting.
 

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Discussion Starter · #3 ·
No exact measurement RK.
Every hull is different.
Every hull is loaded differently.
That's the reason for jack plates.
They are adjustable in small increments.
Trial and error to find the best setting.
I kind of figured as much...

Well...here's what I've got so far:

Straight edge level with bottom of hull (which is obviously flat bottomed) = 2" from bottom of cavitation plate (@ the water intake)

Distance from bottom of cavitation plate to top of water intake = 1 1/8" (distance from bottom of cavitation plate to top of ugly, chewed up prop is the same)

Setback = approximately 4.5"

How does that sound?
 

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No exact measurement RK.
Every hull is different.
Every hull is loaded differently.
That's the reason for jack plates.
They are adjustable in small increments.
Trial and error to find the best setting.
I kind of figured as much...

Well...here's what I've got so far:

Straight edge level with bottom of hull (which is obviously flat bottomed) = 2" from bottom of cavitation plate (@ the water intake)

Distance from bottom of cavitation plate to top of water intake = 1 1/8" (distance from bottom of cavitation plate to top of ugly, chewed up prop is the same)

Setback = approximately 4.5"

How does that sound?
Probably 1/2" to 3/4" low from my experience but its conservative.  You would most likely need a stabilizer plate and a heavy cupped 4 blade prop to get it higher.

Just my .00000000000002.5 sense
 

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1,650 Posts
Discussion Starter · #5 ·
No exact measurement RK.
Every hull is different.
Every hull is loaded differently.
That's the reason for jack plates.
They are adjustable in small increments.
Trial and error to find the best setting.
I kind of figured as much...

Well...here's what I've got so far:

Straight edge level with bottom of hull (which is obviously flat bottomed) = 2" from bottom of cavitation plate (@ the water intake)

Distance from bottom of cavitation plate to top of water intake = 1 1/8" (distance from bottom of cavitation plate to top of ugly, chewed up prop is the same)

Setback = approximately 4.5"

How does that sound?
Probably 1/2" to 3/4" low from my experience but its conservative.  You would most likely need a stabilizer plate and a heavy cupped 4 blade prop to get it higher.

Just my .00000000000002.5 sense
So, it should be fine where it is with a stock/OEM prop (11 pitch) and no Permatrim?

Capn' Ron, I'll probably be calling you sometime next week about a new prop! I'll be needing suggestions!
 
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