T-H Marine JPZ-4 Z-Lock Manual Jack Plate, 4 Inch Setback, Aluminum, Fits V6 and V8 Outboards up to 300 HP

The T-H Marine JPZ-4 Z-Lock Manual Jack Plate is a 4 inch setback jack plate built from full 1/2 inch aircraft grade aluminum for strength and stability at the transom. It is part of T-H Marine's HI-JACKER Z-Lock series, which uses a Z-Lock design with matching slotted extrusions that lock the side plates in place, eliminating the side slippage and lateral movement common with conventional jack plate designs. This rigidity keeps the outboard positioned correctly under load, particularly at higher speeds and during hard turns.

The JPZ-4 is rated to handle all V6 and V8 outboards up to 300 hp, making it suited to a wide range of performance and bay boat applications. Height is adjusted from the top of the jack plate with a single center bolt adjustment point, and the unit provides 5 inches of vertical adjustment to fine-tune engine height for the boat and running conditions. As a manual (non-hydraulic) plate, it has no pump, reservoir, or lines to install or maintain.

Setback determines how far the engine is moved aft of the transom, and the JPZ-4's 4 inch setback is the shortest option in the Z-Lock lineup, which is also offered in 6, 8, 10, and 12 inch setbacks. Because setback affects handling and the manufacturer notes that adding a jack plate can affect boat performance, checking with the boat manufacturer or a local dealer for a setback recommendation before installing is advised. Mounting bolts and hardware needed for installation should be confirmed at time of purchase.

Specifications

• Brand: T-H Marine
• Manufacturer Part Number: JPZ-4
• Product Name: Z-Lock Jack Plate
• Setback: 4 inches
• Vertical Adjustment: 5 inches
• Material: Aircraft grade aluminum, full 1/2 inch thick
• Engine Compatibility: V6 and V8 outboards up to 300 hp
• Adjustment Method: Single center bolt adjustment point, adjusted from top of jack plate
• Design Feature: Z-Lock matching slotted extrusions lock side plates in place to eliminate side slippage
• Load Capacity: 300 to 500 pounds
• Color: Silver
• Product Dimensions: 16 x 6.75 x 13.88 inches
• Weight: 26.9 pounds

Fitment

• V6 and V8 outboards up to 300 hp

Frequently Asked Questions

What setback does the T-H Marine JPZ-4 provide? The JPZ-4 provides a 4 inch setback, the shortest option in T-H Marine's Z-Lock jack plate series, which also comes in 6, 8, 10, and 12 inch setback versions.

What outboards is the JPZ-4 Z-Lock Jack Plate compatible with? It handles all V6 and V8 outboards up to 300 hp, making the JPZ-4 suited to a wide range of performance outboard setups.

How much vertical adjustment does this jack plate allow? The JPZ-4 offers 5 inches of vertical adjustment, letting you tune engine height for different running conditions.

What material is the JPZ-4 jack plate made from? It is constructed from aircraft grade aluminum, using full 1/2 inch material for strength and rigidity at the transom.

Is the JPZ-4 a manual or hydraulic jack plate? The JPZ-4 is a manual jack plate, adjusted with a single center bolt adjustment point from the top of the unit rather than a hydraulic pump.

How does the Z-Lock design differ from a standard jack plate? The Z-Lock design used on the JPZ-4 features matching slotted extrusions that lock the side plates in place, which eliminates the side slippage and lateral movement found in conventional jack plate designs.

What are the dimensions and weight of the JPZ-4? The JPZ-4 measures 16 x 6.75 x 13.88 inches and weighs 26.9 pounds.

What load capacity does the JPZ-4 support? The JPZ-4 Z-Lock Jack Plate has a rated load capacity of 300 to 500 pounds.

Does the JPZ-4 come with mounting bolts? No, mounting bolts are not included with the JPZ-4 and must be sourced separately for installation.

Should I check with my boat manufacturer before installing the JPZ-4? Yes, T-H Marine recommends contacting your boat manufacturer or local dealer for a setback recommendation, since adding a jack plate like the JPZ-4 can affect boat performance.

What color finish does the JPZ-4 have? The JPZ-4 has a silver finish, consistent with its aluminum construction.

How is the JPZ-4 different from the longer setback Z-Lock plates? The JPZ-4 uses the same aluminum Z-Lock construction and 5 inch vertical adjustment as the rest of the series, but with a shorter 4 inch setback compared to the 6, 8, 10, and 12 inch versions.