T-H Marine Z-Lock Manual Jack Plate

T-H Marine Z-Lock Manual Jack Plate

The T-H Marine Z-Lock Manual Jack Plate is a heavy-duty setback plate designed for today’s high-output outboards. Built for reliability and strength, the Z-Lock gives you precise engine height control to help your boat launch harder, run faster, and handle better across a wide range of water conditions.

With its unique Z-Lock side-plate design, this jack plate locks the engine solidly in place and resists side slippage under load. That means more consistent handling, better lift, and dependable performance for high-horsepower rigs that demand a stable mounting platform.

Key Benefits

• Stronger hole shot and lift – Adjust engine height to help your boat get on plane quicker and carry heavier loads more efficiently.
• Improved top-end performance – Fine-tune engine height to reduce drag, optimize RPMs, and get the most speed and fuel efficiency out of your setup.
• More control in changing conditions – Dial in engine height for different loads, water depths, and sea states to keep the boat riding smoother and more stable.
• Manual adjustment on the water – A simple wrench-adjust system at the top of the jack plate makes it possible to change engine height without pulling the boat from the water.

Heavy-Duty Z-Lock Design

The Z-Lock Manual Jack Plate uses interlocking side plates and slotted extrusions that are engineered to stay locked in place under heavy loads. This design helps prevent side slippage and keeps the engine tracking true, even in rough water or at higher speeds.

The plate is built from rugged, high-quality aluminum and hardware for long-term durability in demanding marine environments, making it a smart choice for serious anglers and performance-focused boaters who prefer a simple, mechanical jack plate over a hydraulic system.

Fit & Applications

The Z-Lock Manual Jack Plate is an excellent option for:

• High-performance bass boats
• Bay and inshore fishing boats
• Multi-species and walleye rigs
• Other V6- and V8-powered hulls that benefit from setback and adjustable engine height

It provides ample vertical adjustment for performance tuning and shallow-water running, and is designed to work with common outboard mounting patterns. For detailed horsepower ratings, vertical travel, and setback options, refer to the specifications table on this page.

Installation Notes

The Z-Lock Manual Jack Plate is designed for straightforward installation on most outboard transoms. Installation will require safely lifting and supporting the outboard, aligning the jack plate on the transom, and properly torquing all mounting hardware.

If you are not comfortable handling and aligning the engine, we recommend having the plate installed by a qualified marine technician. Always review the installation instructions and verify compatibility with your specific hull, engine, and recommended setback before purchase.

T-H Marine Z-Lock Jack Plate FAQs

What size engines is the Z-Lock Manual Jack Plate designed for?

The T-H Marine Z-Lock Manual Jack Plate is built for high-output outboards and is commonly used with V6 and V8 engines up to 300 HP, depending on the specific model and application. For exact horsepower and weight ratings, refer to the specifications table on this page and your engine manufacturer’s recommendations.

How is a manual jack plate different from a hydraulic jack plate?

A manual jack plate like the Z-Lock uses a mechanical adjustment system that is set with a wrench at the plate. It holds engine height firmly in place once set and is ideal for boaters who do not need constant on-the-fly height changes. A hydraulic jack plate adds push-button control from the helm and allows frequent adjustments while underway, but comes with added cost and more components.

Can I adjust the Z-Lock jack plate while the boat is in the water?

Yes. The Z-Lock is designed so that engine height can be adjusted at the top of the jack plate using hand tools while the boat is in the water. However, the engine must be safely supported and secured, and any adjustments should be made with the engine off and the boat stable. It is not intended for rapid, continuous adjustment like a hydraulic jack plate.

How do I choose the right setback for my boat?

Setback is the distance the engine is moved rearward from the transom. Smaller setbacks are common on lighter, faster hulls, while larger setbacks can help heavier boats or rigs that benefit from extra lift and cleaner water flow to the prop. The best choice depends on your hull design, engine weight, and how the boat is loaded. If you are unsure, check your boat manufacturer’s recommendations or consult a knowledgeable dealer or technician with your boat and engine details.

Is the Z-Lock Manual Jack Plate suitable for saltwater use?

Yes. The Z-Lock Manual Jack Plate is built from high-quality aluminum and marine-grade hardware and can be used in both freshwater and saltwater environments. As with any equipment used in saltwater, rinsing with fresh water after use and performing regular inspections and maintenance will help maximize service life.

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