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SKU:
NLT1R03025
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JPL4500 Adjustable Outboard Jack Plate - 6-Inch Setback, 4-Inch Lift, 40–225 HP
$339.99
In Stock
$339.99
Sale price
$339.99
Regular price
Manual JPL4500 outboard jack plate with six-inch setback, four inches of vertical adjustment, and a 40–225 horsepower application range.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- Outboard-powered boats with a standard BIA engine-bolt pattern
- 40–225 HP outboards within the boat, transom, and plate weight limits
- Installations that can safely accommodate six inches of setback and four inches of vertical adjustment
Product Overview
A jack plate is often chosen when the motor sits too low, a long-shaft outboard needs height correction, shallow-water clearance matters, or the boat owner wants to tune engine height for cleaner running. It is also a structural change, so transom strength, engine weight, steering, control cables, water pressure, and propeller behavior must be considered together.
The plate moves the outboard six inches aft and allows four inches of manual height adjustment on a common BIA mounting pattern. The best position is the one that preserves cooling-water supply, steering clearance, safe handling, and manufacturer limits—not simply the highest setting.
Key Features & Performance
- Six-inch outboard setback
- Four inches of manual vertical adjustment
- Polished aluminum construction at approximately 27 pounds
- Broad 40–225 HP range for boats and transoms approved for the added leverage
Replaces Part Numbers
- JPL4500
Common Uses
- Raising or lowering an outboard to correct installed engine height
- Adding setback for rigging clearance or performance tuning
- Improving shallow-water clearance within safe cooling limits
- Matching a long-shaft motor to an approved transom setup
Technical Specifications
- Product Type: Manual Outboard Jack Plate
- Model: JPL4500
- Setback: 6 in
- Vertical Adjustment: 4 in
- Recommended Power Range: 40–225 HP
- Approximate Plate Weight: 27 lb
- Material: Polished aluminum
- Mounting Pattern: Standard BIA pattern
Installation & Fitment
- Have the boat and transom structure evaluated for engine weight and added setback leverage
- Support the outboard with rated lifting equipment and use specified marine mounting hardware and sealant
- Check steering, shift, throttle, fuel, electrical, and hydraulic lines through the full trim and steering range
- Set height conservatively, verify cooling-water pressure, retorque fasteners, and water-test handling before full-speed use
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.
Production date, serial number, engine option, dimensions, connections, and previous repairs can change the part used within the same model. Compare the removed item and service information before purchase.
Frequently Asked Questions
Q: Will a jack plate automatically make the boat faster? A: No. Results depend on hull, motor, propeller, load, height, setback, and setup. An unsafe height can cause ventilation, overheating, or poor handling.
Q: Can I install this on a weak or cracked transom? A: No. Repair and evaluate the transom first; setback increases leverage on the structure and mounting hardware.
Q: Why should I compare the removed part? A: Use the compatible list as a starting point, then compare the original reference number, dimensions, connections, mounting details, production date, and equipment or engine serial information.
Q: Is this a factory-branded component? A: This is a new aftermarket part. The brand and model names identify the applications it is intended to service.
Part Summary
keywords: JPL4500 jack plate, 6 inch setback outboard plate, 4 inch manual jack plate, 40-225 HP engine lift, adjustable boat motor mount, aluminum outboard setback plate
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.