T-H Marine JP-4FA Hi-Jacker Fixed Jack Plate, 4 Inch Setback, Up to 150 HP Outboards

The T-H Marine Hi-Jacker JP-4FA Fixed Jack Plate is a solid aluminum extrusion bracket built to solve one of the most common rigging problems on the water: mounting a long shaft outboard to a short transom. Machined from 3/8 inch thick aluminum, this fixed jack plate is engineered as an inexpensive, permanent solution rather than a hydraulic or adjustable setup, and it also works well as a fixed jack plate on all V6 outboards. It is rated to handle any outboard up to 150 hp.

The plate features three engine mounting holes on top plus a mounting slot on the bottom, combined with two transom mounting holes, giving installers flexibility when aligning the outboard to the transom. Its 3 inch designed lift, combined with the plate's own thickness, produces a total vertical lift of 5 1/2 inches along with a full 4 inches of setback, moving the propeller further from the transom to help improve water flow to the prop and reduce transom-induced turbulence at speed.

Because it is a fixed (non-hydraulic) design, the JP-4FA has no moving parts to maintain, seal, or fail, making it a durable, low-cost alternative to adjustable jack plates for boats that do not need on-the-water height adjustment. It ships as a single unit ready for transom mounting.

Specifications

• Brand: T-H Marine
• Manufacturer Part Number: JP-4FA
• Material: Aluminum (3/8 inch thick aluminum extrusion)
• Setback: 4 inches
• Total Vertical Lift: 5 1/2 inches
• Designed Lift: 3 inches
• Engine Mounting Holes: 3, on top, plus a mounting slot on the bottom
• Transom Mounting Holes: 2
• Maximum Horsepower: 150 hp
• Weight: 11.29 pounds
• Product Dimensions: 16 x 10 x 5.5 inches
• UPC: 733572002065

Fitment

• Fits outboards up to 150 hp requiring a short-transom-to-long-shaft solution
• Also suitable as a fixed jack plate for all V6 outboards

Frequently Asked Questions

What is the maximum horsepower rating for the JP-4FA jack plate? The T-H Marine JP-4FA Hi-Jacker Fixed Jack Plate is rated to handle any outboard up to 150 hp.

How much setback and lift does this jack plate provide? The JP-4FA gives a full 4 inches of setback and, with its 3 inch designed lift, a total vertical lift of 5 1/2 inches.

What is the JP-4FA made of? It is made from a solid, 3/8 inch thick aluminum extrusion, built as a tough, one-piece bracket rather than a welded or multi-part assembly.

Does this jack plate adjust while the boat is running? No. The JP-4FA is a fixed jack plate, meaning its lift and setback are set at installation and do not adjust hydraulically or manually once mounted.

Why would I need a jack plate like the JP-4FA? This jack plate provides an inexpensive way to mount a long shaft outboard onto a short transom, and it also works as a fixed jack plate for all V6 outboards.

How many mounting holes does the JP-4FA have? The JP-4FA has three engine mounting holes on top plus a mounting slot on the bottom, along with two transom mounting holes.

How much does the JP-4FA weigh? The T-H Marine JP-4FA weighs 11.29 pounds.

What are the overall dimensions of the JP-4FA jack plate? The JP-4FA measures 16 x 10 x 5.5 inches.

Is there a version for higher horsepower outboards? Yes, T-H Marine offers the JP-4FAHD as a separate part for outboards up to 300 hp; the JP-4FA covers outboards up to 150 hp.

Will the JP-4FA fit any outboard brand? The JP-4FA is designed to handle any outboard up to 150 hp and works as a fixed jack plate for all V6 outboards, without being limited to one outboard brand.

Is the JP-4FA sold as a complete, ready-to-install unit? Yes, the JP-4FA ships as a complete aluminum jack plate bracket ready for transom and engine mounting.