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SKU:
NLT1F02257
Ships for free in 2–4 business days.
Voltage Regulator Rectifier for Mercury 75 80 90 100 HP 2-Stroke Outboards
$25.99
In Stock
$25.99
Sale price
$25.99
Regular price
Restore charging-voltage control on compatible Mercury 75, 80, 90, and 100 HP 2-stroke outboards with a matching regulator rectifier.
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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
- Mercury 75 HP 2-stroke outboards with matching regulator
- Mercury 80 HP 2-stroke outboards with matching regulator
- Mercury 90 HP 2-stroke outboards with matching regulator
- Mercury 100 HP 2-stroke outboards with matching regulator
- Mariner equivalents using the same connector and reference number
Product Overview
An overcharging battery, weak charging output, burned connectors, or electronics that act up as engine speed changes can point to the regulator rectifier. This unit converts stator output and controls charging voltage when its plugs, wire count, and mounting pattern match the original.
Mercury used several regulators across these horsepower ranges. Compare the casting, connectors, wire colors, and original part number before purchase; horsepower alone is not enough.
This is an aftermarket replacement part and is not manufactured or supplied by the original equipment brand.
Key Features & Performance
- Replacement charging-system regulator and rectifier
- For select Mercury 75-100 HP 2-stroke outboards
- Controls converted stator output to the battery circuit
- Useful after stator, battery, grounds, and wiring have been tested
Common Uses
- Repairing low or unstable battery charging
- Correcting confirmed over-voltage
- Replacing a heat-damaged regulator or melted connector
- Restoring DC charging after stator output tests good
Technical Specifications
- Product Type: Outboard voltage regulator rectifier
- Engine Type: Select Mercury two-stroke
- Horsepower Range: 75-100 HP applications
- Fitment Check: Original number, wire count, connectors, and mounting
Installation & Fitment
- Disconnect the battery
- Test battery condition, stator output, grounds, and connector voltage drop
- Match every wire and plug to the original part
- Repair burned terminals instead of plugging into damaged wiring
- Verify charging voltage at idle and higher engine speed in a safe test setup
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown. Model names alone may not guarantee fitment. Compare the original component, reference number, connector or mounting design, dimensions, and any serial-number or production-date break before purchase.
Frequently Asked Questions
Q: Can a bad regulator overcharge the battery? A: Yes. It can also cause weak or unstable charging, but the stator and wiring need testing too.
Q: Does this fit every Mercury 90 HP 2-stroke? A: No. Match the original regulator and connector layout.
Q: Should a melted plug be reused? A: No. Heat-damaged terminals create resistance and can quickly damage the replacement.
Part Summary
keywords: Mercury 90 HP regulator rectifier, 75 HP outboard charging repair, Mercury 100 two stroke voltage regulator, Mariner charging module, outboard battery overcharging fix, marine rectifier replacement
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.