Answer: If you need to move a small outboard motor higher or adjust setback on a jon boat or other small craft, a 4″ jack plate with sturdy aluminum construction is often the best choice. For shallow-water versatility, choose a model with adjustable height or explicit setback. This guide covers five reliable jack plates that fit motors up to 30–35 HP and suit jon boats, skiffs, aluminum boats, and inflatables. Each entry explains who it’s best for, why it’s selected, and any notable limitations.
| Product | Best For | Setback / Height | Material | Notes |
|---|---|---|---|---|
| Camoo MJ-1-DP | Small boats needing 4″ setback | 4″ setback | Cast aluminum | Wood block included; fits up to 35 HP |
| VELCKING MJ-1-DP | Adjustable height tuning | 4″ optional setback | Hard steel alloy | Includes mounting hardware |
| ElaraBerry Fixed 4″ Jack Plate | Budget-friendly, corrosion resistance | 4″ fixed setback | Aluminum extrusion | 3 engine mount holes |
| Bzcovac MJ-1-DP Mini Jack Plate | Performance tweaks for 6–35 HP | 4″ setback, 3″ lift | Cast aluminum | Wood mounting option available |
| T-H Marine Mini Jacker | Simple, quick on-water adjustments | 4″ setback, 3″ vertical offset | Cast aluminum | Clamp-on design |
Camoo MJ-1-DP Jack Plate 4″ Setback
Best for clamp-on, small outboard motors up to 35 HP. Cast aluminum offset design lifts the engine 4″ from the transom, improving propeller efficiency and reducing cavitation. The wooden mounting block helps ensure a secure fit on wood transoms or blocks where needed. This option is well-suited for skiffs, aluminum boats, and inflatables that require a simple, heavy-duty mounting upgrade.
Who it’s for: boaters with short transoms who want a straightforward 4″ setback and a factory-style wood block for a solid install. Better for: reliable, no-fruss installation with basic mounting needs. Caution: wood block inclusion means check fitment for non-wood transoms and consider sealing to prevent water intrusion over time.
VELCKING MJ-1-DP Jack Plate 4″ Setback
Best for adjustable height tuning on small engines up to 35 HP. Height can be adjusted to suit riding attitude and propeller efficiency, with 0–100 mm adjustments in 20 mm increments. The kit includes rubber pad mounting blocks and stainless screws for secure, non-damaging mounting. Durable construction withstands boat wake and rough water.
Who it’s for: boaters who want precise engine height tuning away from the transom. Better for: optimizing performance and ride quality. Limitation: heavier hardware and incremental height steps may require precise measurement during installation.
ElaraBerry Fixed 4 Inch Jack Plate
Best for budget-conscious buyers seeking corrosion resistance and straightforward mounting for small outboards. Solid aluminum extrusion construction provides reliable strength with minimal flex, and its fixed 4″ setback aligns the engine for improved waterline balance and control. Three engine mount holes and two transom holes offer flexible alignment across various boats.
Who it’s for: those repowering or replacing a damaged transom setup on small boats. Better for: steady, maintenance-friendly installations. Caution: fixed height means less flexibility if you later need a different engine height.
Bzcovac MJ-1-DP Mini Jack Plate
Best for performance-focused upgrades on small boats using 6–35 HP outboards. The 4″ setback moves the engine away from the transom to boost propeller efficiency and reduce cavitation, while the 3″ lift further minimizes prop wash and shallow-water disturbance. Cast aluminum construction ensures good corrosion resistance and durability. Mounting wood is included with some configurations.
Who it’s for: anglers and light-duty users wanting noticeable performance improvements at a reasonable price. Better for: shallow-water navigation and stable handling. Limitation: may require precise alignment when pairing with particular transom designs.
T-H Marine Mini Jacker
Best for quick, on-water adjustments on small outboards up to 35 HP. This clamp-on jack plate provides a 4″ setback and a 3″ vertical offset to help boats plane faster and ride more smoothly. It emphasizes ease of installation and use, making it a practical choice for DIY enthusiasts who want fast tunability without complex setup.
Who it’s for: boaters who frequently adjust engine height or reposition for different loads and conditions. Better for: on-the-water tweaking and simple retrofits. Caution: clamp-on design may require periodic checking to maintain secure clamping force, especially under heavy engine use.
Buying Guide
Key considerations when choosing a john boat jack plate:
- Engine compatibility: Most options target small outboards (up to 35 HP). Confirm your motor’s shaft length and horsepower to select the correct setback and lift.
- Setback and lift: More setback moves the engine further from the transom, improving water flow and prop efficiency; lift height affects stern draft and cavitation. Choose a model with the desired combination (4″ setback is common).
- Material and corrosion resistance: Aluminum jack plates resist marine corrosion well; fixed vs. adjustable height affects long-term maintenance and flexibility.
- Mounting style: Clamp-on and wood-block designs vary in ease of installation and transom compatibility. Rubber blocks and stainless hardware reduce vibration and wear.
- On-water adjustability: If you anticipate frequent changes for different conditions, prioritize models offering height or angle adjustments without removing the plate.
- Installation considerations: Some plates include mounting blocks or hardware; check whether your transom type (wood, aluminum) is compatible with included components.
Frequently Asked Questions
- What is a jack plate and why would I need one on a jon boat?
A jack plate moves the engine away from the transom and/or changes its height to improve propeller efficiency, reduce cavitation, and enhance planing in shallow water. - Can I install a jack plate myself?
Yes, many clamp-on or bolt-on plates are designed for DIY installation, but you should follow manufacturer instructions and ensure proper mounting hardware. - What horsepower range do these jack plates support?
The models listed generally support up to 30–35 HP, suitable for small jon boats, skiffs, and inflatable boats. - Do all jack plates come with mounting hardware?
Some include blocks and hardware; others require you to supply your own. Verify package contents before purchase. - Are fixed-height plates better than adjustable ones?
Fixed-height plates are simpler and cheaper; adjustable plates offer more tuning flexibility for varying loads and water conditions. - Will a 4″ setback cause adverse handling in deep water?
A 4″ setback is designed to improve performance in most shallow and mid-water conditions; in some setups, it can alter steering feel slightly, so test under safe conditions.