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Old 01-03-2009, 07:35 AM
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Default What does a jack plate do??

I have the basic idea of what a jack plate is for, I see them all the time on bass boats and flats boats.

Would or is there any need to install one on a deep v cc such as my 21' Sea Pro.

I have been told it is a more efficient way for a motor to operate and that you loose power/speed by trimming a motor up for running and that this eliminates this.

Just curious if it is worth looking into with my boat, not real serious but just curious.

Pretty much very happy with performance on my boat right now but like anyone else always looking for more
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Old 01-03-2009, 07:41 AM
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Default Re: What does a jack plate do??

I doubt it would be any benefit on a deep v, unless you use it for puttering around in skinny water alot. That's really what it's for is raising your motor to the "at rest" waterline when you're in super shallow water (such as shallow water sight casting for reds) and lowering it to the
"planing" waterline when you're under way.
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Old 01-03-2009, 07:51 AM
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Default Re: What does a jack plate do??

A Jack plate can benefit the performance of any boat by getting the motor height exactly right.... and allow you to make adjustments based on current conditions.
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Old 01-03-2009, 08:17 AM
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Default RE: What does a jack plate do??

I think you could find a mile and our or two and a slight improvement in fuel economy with a hydraulic plate so you can adjust it to suit the water conditions. Fixed engine mounting is always a compromise because it needs to be low enough to have bite in the slop, but not have excessive drag. They are somewhat expensive, but they are worth the effort to install. I think the utility declines as the size of the boat increases, so I have not been inclined to put 'em on my 34, but I think you'd like it on a 21. It has to be adjustable on the fly and you don't really need a gage to show you where it is. The gages work, but you'll quickly get a feel for where it is and where it wants to be.
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Old 01-03-2009, 08:45 AM
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Default Re: What does a jack plate do??

Top performance comes from a combination of engine trim and engine height. All boats are different as to what is the best combination. Even loading a boat can come into play, i.e. more weight forward or aft can give you incremental gains (or loses).

If your boat is set up for performance now as far as engine height, you might find a couple of MPH with a jack plate. You could see a big improvement (5 MPH+) if it's not set up for speed.
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Old 01-03-2009, 09:04 AM
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Default Re: What does a jack plate do??

tprice on bay boats with tunnels jack plates allow you to raise the outboard to actually run in a foot or less water.

On a deep vee/semi vee the return is marginal at best.


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Old 01-03-2009, 11:15 AM
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Default Re: What does a jack plate do??

Quote:
jtburf - 1/3/2009 12:04 PM

tprice on bay boats with tunnels jack plates allow you to raise the outboard to actually run in a foot or less water.

On a deep vee/semi vee the return is marginal at best.


John

Thanks, just curious as to exactly what they did but had a pretty good idea
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Old 01-03-2009, 11:31 AM
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Default Re: What does a jack plate do??

If you decide to add one to your boat you may need new shift/steering cables because of the increased movement of the motor. I needed to on mine (18'8" Maycraft centerconsole)

The other thing you need to keep in mind is the added weight on your stern may affect scuppers. You need to take in to account the weight of the plate and the hydralic motor, etc.

I feel like it has really improved the ride of my boat in all conditions! Taking off in shallow water is easier; Wide open in calm condtions definitely uses less fuel; trolling through shallow water looking for bait is more manuverable; etc.

I wish I would have had it put on the boat when it was brand new and probably will on my next one!
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Old 12-12-2013, 11:31 AM
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Default Boat Jack Plates

What little gas mileage you would improve upon with a jack plate set at the right height (at the end of the day, you won't notice it much). What a jack plate will help you with is absolutely the versatility of the depth of water you can operate in when the motor is at rest and trolling. Yes, you can adjust the jack plate so that it helps your boat plane out at different speeds with different drags, but the reality is most people who use jack plates are lake fishermen who typically fish on lakes where they don't get to go "balls out" for more than 1-2 miles. If you sustained the speed of 30-40mph over 10 miles then you can make the argument about gas mileage.

If you want some general installation instructions on jack plates visit:
Jack Plate Installation
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Old 12-12-2013, 11:35 AM
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4 year old thread??
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Old 12-12-2013, 11:53 AM
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