Best Jack Plates for 115 Hp Outboards: Hydraulic, Adjustable and Fixed Options
Answer: If you have a 115 hp outboard, choose a hydraulic or adjustable jack plate that provides reliable engine height adjustment, solid corrosion resistance, and compatibility with mid-range to high-horsepower motors. The top picks below cover hydraulic, electric hydraulic, and adjustable manual options, each suited to boat sizes where a mid-to-large outboard benefits from improved waterline clearance and lift. The buyers most likely to benefit are anglers, small boat owners, and performance-focused skippers seeking better lift, handling, and trim control.
| Product | Best For | Setback / Lift | Motor HP Range |
|---|---|---|---|
| T-H Marine – PL-65 High Speed Hydraulic Jack Plate | V-6 engines and smaller, salt/fresh water use | High speed hydraulic lift (precision), no welds or castings to break | Suitable for V-6 motors and smaller |
| Winibo 6″ Electric Hydraulic Jack Plate | Heavier outboards up to 350 HP with 6″ setback | 7.5″ total lift with 1.5″ lift built-in | Up to 350 HP |
| Pindex 4″ Adjustable Outboard Jack Plate | Precise mounting and height for longer shaft setups | 4″ setback; IP68 rating; pre-drilled mounting | Up to 225 HP |
| KUAFU 6″ Set Back Jack Plate | Mid-range to higher HP boats needing 6″ setback | 6″ setback design | 40-150 HP |
| ElaraBerry Fixed Jack Plate 4″ Setback | Budget-friendly, simple fixed height alignment | 4″ fixed setback, corrosion resistant | General use with small to mid-range motors |
T-H Marine PL-65 High Speed Hydraulic Jack Plate
The PL-65 is designed for high-speed hydraulic operation with no welds or castings to break, making it suitable for fresh and salt water use. It is rated for V-6 motors and smaller, aligning with mid-power outboards around the 115 hp range. This jack plate offers quick height adjustments to optimize depth and trim, which helps with planing and handling in varying water conditions.
Best for: Boat owners with V-6 or smaller engines who want reliable, high-speed hydraulic raising and lowering to optimize performance. Avoid if you need a larger offset or higher HP range beyond V-6 configurations.
Caution: The unit’s best performance is with compatible motor configurations; verify shaft length and mounting pattern before installation.
Adjustable Manual Boat Jack Plate – On The Fly, 30hp Class
This manual jack plate is marketed for up to 30hp, offering fast on-the-water adjustability and quick motor height changes. It suits lightweight boats, small skiffs, and boats that only occasionally need re-trimming during operation. For a 115 hp outboard, use as a supplementary, temporary height adjuster or in boats where the engine is often swapped or repowered to a smaller unit.
Best for: Small, lightweight craft where engine adjustments will frequently occur on the water. Better for: users prioritizing quick manual changes over hydraulic automation. Limitation: Not designed for the higher HP range typical of a 115 hp outboard.
MJ-1-DP Jack Plate 4” Setback (Camoo)
Designed for clamp-on mount outboard motors up to 35 HP, this wooden-block-equipped jack plate extends the engine 4″ off the transom. It targets small boats, skiffs, and inflatables where a longer drive shaft would otherwise be an issue. It provides a simple, sturdy mounting solution and is easy to install for casual or backup setups.
Best for: Very small boats or motors near the 25–35 HP range. Choose this if you need a wood-block mounting solution and a modest 4″ setback. Limitation: Not suitable for mid-range to high-horsepower outboards like 115 hp.
Winibo 6″ Electric Hydraulic Jack Plate
This 6″ electric hydraulic jack plate supports motors up to 350 HP and provides a robust lift with a built-in 1.5″ lift and a total of 7.5″ travel. The hydraulic system enables smooth and precise adjustments, which is advantageous for boats with heavier outboards or those that require frequent height changes. It’s a strong choice for larger engines within the 115 hp to higher HP spectrum.
Best for: Boats with heavier outboards or those requiring substantial lift and precise electric hydraulic control. Better for: higher HP applications where smooth, repeatable adjustments matter. Caution: Ensure electrical compatibility and mounting space for the hydraulic system on your transom.
On The Fly Adjustable Manual Boat Jack Plate – Large Unit
This large-unit manual jack plate supports up to 50hp and offers on-the-water adjustability. It is designed for larger boats in the manual-adjustment category, allowing height changes without the need for hydraulic systems. For 115 hp outboards, this is typically used in lightweight, small-hull configurations or as an auxiliary height adjuster rather than a primary lifting mechanism.
Best for: Boats where manual adjustments are preferred or required due to simplicity or budget. Limitation: Not ideal as a primary hydraulic solution for 115 hp engines.
Buying Guide: Key Considerations For 115 Hp Outboard Jack Plates
What setback is right for my boat? Setback distance affects holeshot and waterline alignment. A 4″ to 6″ setback is common for mid-range engines, while larger boats or heavier motors may benefit from greater setback and lift.
Hydraulic vs. manual: For 115 hp engines, hydraulic or electric-hydraulic jack plates offer smoother, faster, and more controllable adjustability, especially during on-water adjustments. Manual units are simpler and cheaper but require more effort and time.
Construction and corrosion resistance: Look for solid aluminum construction and corrosion resistance, especially for saltwater use. Welds, castings, and mounting hardware should be robust to reduce failure risk.
Engine compatibility: Verify horsepower range, shaft length compatibility, and mounting patterns. Some models are rated for high HP ranges; others target smaller engines. Confirm shaft height and transom configuration before purchase.
Installation and maintenance: Simple mounting and pre-drilled holes can simplify installation. Consider maintenance needs for hydraulic lines, pumps, and seals if choosing a hydraulic system.
FAQ
- What is a jack plate and why do I need one for a 115 hp outboard?
A jack plate adjusts engine height and setback, improving planing time, lift, and handling. For a 115 hp outboard, it helps optimize water flow and trim for better performance and fuel efficiency.
- Do I need hydraulic power for my jack plate?
Hydraulic or electric hydraulic systems offer smoother, faster adjustments on the water, which is beneficial for mid-range to high-horsepower engines. Manual options exist but require more effort.
- What setback should I choose?
Typically 4″ to 6″ for mid-range to higher HP engines; larger boats or heavier motors may require more setback. Ensure compatibility with your hull and prop selection.
- Can a jack plate improve fuel efficiency?
Yes, by optimizing the waterline and propeller bite, a properly set jack plate can improve efficiency in certain conditions and loads.
- Is installation complex?
It can vary. Manual units are simpler; hydraulic systems require more components and wiring. Consult your hull manufacturer guidelines and consider professional installation if needed.
- What maintenance is required?
Hydraulic systems need periodic inspection of seals and fluid lines, plus battery or power connections for electric models. Manual units mainly require tightening hardware and checking mounting integrity.