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Jack Plates 8"

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55.00 LBS
Calculated at Checkout
  • Jack Plates 8"
  • Jack Plates 8"
  • Jack Plates 8"
  • Jack Plates 8"
  • Jack Plates 8"
Frequently bought together:


AHJ-8V-DP Atlas Hydraulic Jack Plate - 8" Setback - 61lbs

T-H Marine introduces

the next generation

in jack plate design,

built for the heaviest

and most powerful V6

engines on the market

today, even the big fourstrokes.

Our innovative

high tech engineered

polymer rod and slot lifting

design guarantees trouble free

action. This plate also features

the newest concept in one-piece

hydraulics from the most respected

name in hydraulic design, providing

the best of all worlds: speed and self

contained lifting action. This all new pump

will lift the heaviest outboard from bottom

to top in less than 8 seconds. Just check out

these features:

• Self Contained Hydraulic Pump System –

No Reservoir or Lines to Install

• Fast! – Bottom to Top in Less than 8 Seconds

• Rod and Slot Lifting Design – Trouble Free Lifting


• Hi-Tech Engineered Polymer Rods – 6 Times

More Abrasion Resistant than Steel

• Rods Made from Self Lubricating Material

• Easy Two-Pin Pump Removal – Quick Maintenance

• Installs in Half the Time of Comparable Jack


• Available in 4”, 6”, 8”, 10” and 12” Setback



Installation Instruction

Welcome to the Atlas World. You have purchased the best Hydraulic Jack Plate that is available. When

installed correctly, this plate will give you many years of trouble free use.

NOTE: T-H Marine recommends

installation by a full service marine dealer to insure proper fit and

trouble free operation. We cannot assume any liability for improper drilling of transom or damage due

to improper installation. This Atlas is designed to accommodate V-4 and V-6 engines only, with a

maximum horsepower rating of 300 HP.


a. Atlas Hydraulic Jack plate

b. Wire harness and accessories with installation instructions and warranty card.

Jack Plate Transom Side Jack Plate Motor Side

Relay Pack Switch


Step 1:

If no outboard engine is mounted to transom skip to Step 3.

Step 2:

If outboard motor is mounted to transom remove engine using proper lifting equipment and

procedures. Be sure the lifting equipment is rated for the necessary lifting capacity. See your local marine

dealer if unsure. Remove mounting bolts and nuts and

carefully swing motor away from boat. It should not be

necessary to remove any cables or wires as most installations have adequate length. Disconnect any wires or

cables that do not have necessary length

and obtain longer wires or cables for completion of installation.

Step 3:

Prepare transom for mounting by removing any silicone residue, dirt or oil. Put a fresh and generous

bead of silicone around each mounting hole. Mount the Atlas jack plate to transom (shortest side 12 ½” long)

using the bolts and nuts from engine removal. If you did not have engine mounting bolts, you will need ½”

stainless mounting bolts and appropriate washers and lock nuts to fit the thickness of your transom. These

fasteners are available from your local marine dealer. It is necessary in our installation that the bolts go through

the transom then through the Atlas jack plate. The nuts attach to the bolts inside the jack plate. We recommend

use of a transom support plate for both the top and bottom mounting bolts, thus eliminating the possibility of the

bolt heads from becoming embedded into transom. T-H Marine Transom support plates are available from your

marine dealer and look like the picture below.


When mounting the Atlas jack plate to your transom, you will note that there are three sets of mounting holes in

the jack plate. Because transoms are different, three mounting hole patterns are pre-drilled. You choose which

best satisfies your transom and engine setup needs. However, make sure that you use same holes on both sides,

so jack plate will set level.

Step 4:

Before mounting engine, the wiring harness will need to be hooked up. Locate desired position for

“Up & Down” rocker switch. Cut 1 ½” x 1” rectangle hole taking care to check for any wires, brackets or cables

behind dash for the switch to pass through. However, do not install switch at this time.

Step 5:

The Harness Pack will contain a rocker switch, a relay pack and a switch harness. When you open

your harness the switch will not have any wires attached, but it will have three terminals to hook the three spade

connectors. There will be a black coated wire that is 20 ft long, on one end will be spade connectors on a

purple, green & blue wire. This is your cable that will run from relay pack to switch. This cable will need to

run from switch to your relay location, which should be near a power source, normally in the battery

compartment. (Note: The spade connectors go to the switch.)

Blue—wire goes to top of switch



Purple—wire goes on middle of switch



Green—wire goes to bottom of switch



Step 6:

Even though the relay pack is water resistant, every effort should be made to locate this relay

assembly in a place that will be as dry as possible. It can be mounted with screws or cable ties. The RED wire

with the 40 amp ATC fuse goes to positive post of your battery. The BLACK wire goes to negative post of

your battery


Now you are ready to plug in all other connectors. The connectors are arranged so they will only plug in one

way. The cable wire from the switch plugs into one connector, the motor wire from jack plate plugs into the

other connector.

Step 7:

You are ready to test your plate. Run plate Up and Down a little at a time to make sure your wires

are correctly placed and not getting caught in plate.

NOTE: If the switch does not work as marked after

your connections are made, then you can swap the blue and green wires to reverse the direction of


Step 8

: If installing a gauge kit (available as an option from T-H Marine and your local dealer), we

recommend install the gauge kit sending unit before mounting the engine. See instructions with gauge kit for

proper installation.

Step 9:

Outboard engine is ready to mount at this time. The engine will mount into selected hole pattern.

You will need (4) ½”-13 x 3” long stainless steel bolts, washers and nuts for this installation also. T-H

Marine’s Bolt Kit (BK-1-DP) is available from your local marine dealer for this use.

After engine is mounted, repeat Step 7 (above) to assure wire clearances and that your plate runs smoothly up

and down.


1. Never continue to hold switch in the up or down position after the

plate has completed its travel in

that direction. Doing so will cause extra amp draw on your battery and could damage the motor

or pump on your jack plate and may burn out the fuse.

2. Always rinse your plate off after every use especially if used in salt water. Keeping the black

composite jack plate sides free of debris is important for smooth operation.

3. After each use, check all mounting bolts to make sure they are tight.

4. Check and clean any loose wires and connections.

5. If you do not have power to the plate, the first thing to check is the in-line 40 amp ATC fuse on

positive side of battery. If the fuse is blown, you’ll need to replace it with a 40 amp fuse.

However, something caused the fuse to blow. So if happens again, trouble shoot your electrical

system immediately and seek help from your marine dealer if necessary. The most likely causes

for the blown fuse are: (1) holding the switch down to long after the plate has completed travel in

one direction and (2) a short in the electrical wiring to the jack plate.

6. Always trailer with the jackplate in the lowest “down” position!



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