TH Marine Z-Lock 4" Jack Plate

The TH Marine Z-Lock 4" Jack Plate is a manual trim and tilt solution designed for anglers and boaters who demand precision control over their outboard motor height without the complexity of hydraulic systems. Whether you're running shallow flats looking for redfish and permit, navigating brackish backwater channels, or adjusting for different water conditions throughout the day, this jack plate gives you the mechanical advantage to fine-tune your motor's running angle instantly. Built by T.H. Marine—a brand trusted by professional guides and weekend warriors alike—the Z-Lock delivers the reliability needed when conditions change fast and your boat's performance depends on exact motor positioning.

The Z-Lock design eliminates side slippage through matching slotted extrusions that mechanically lock your side plates in place, preventing the drift and binding that plague lesser jack plates under power or rough water. Machined from aircraft-grade aluminum, this 4-inch model delivers the strength needed to support substantial outboard weights while remaining corrosion-resistant in saltwater environments. The full ½" material thickness ensures durability through years of adjustment cycles, and the manual operation means no hydraulic fluid to service, no electrical components to fail, and no dependency on battery voltage when you need to adjust trim on the water.

This jack plate is ideal for operators running mid-range outboards on center consoles, bay boats, and flats skiffs where weight savings and mechanical simplicity matter. Installation mounts directly to your transom, and the 4-inch vertical travel provides adequate height adjustment for most freshwater and coastal applications without requiring engine-specific brackets. The manual crank system requires no auxiliary power, making it exceptionally reliable for remote fishing trips and situations where electrical redundancy is critical. If you've experienced side-to-side slop in older jack plates or want to upgrade from a fixed motor mount, the Z-Lock's anti-slip design and aluminum construction represent a measurable improvement in control and longevity.