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New six (6) wire 20 AMP Voltage Regulator Rectifiers for Mercury 2-Stroke Outboards running 9, 16, or 40 amp ignition systems.  Motors with 40 AMP systems will run two (2) of these 20 AMP Voltage Regulator Rectifiers, and pre-1990 outboards with 9 or 16 AMP systems run one (1) of 20 AMP Voltage Regulator Rectifiers.


Fits Mercury 40-135, 150, XR4,  XR6, 175, XRI, 200 HP, Carb, EFI  and Pro Max 200 and 225 hp outboards, as well as SportJet 175 hp and 210hp jet boat motors.


Wiring Instructions:


  • Two (2) Yellow Wires are the AC voltage wires and should be connected to your two (2) yellow wires coming off the stator.


  • Two (2) Red Wires are the DC voltage wires and should be connected to your 12-volt battery or the 12v battery cable on the same post on your starter solenoid. 


  • One (1) Gray Wire is your tach wire and should be connected to the gray tach wire in your harness or directly to your tach.


  • One (1) Black Ground Wire is your Ground wire and should be connected to the engine block or directly to the ground on your battery.


It is recommended to rig these with splice connectors and heavy tubular shrink wrap vs the OEM butt connectors. Water Ingress affects the butt connectors from the factory and has proven to get hot, turn brown, short out, and or melt the insulation and they end up grounding out on the black. This tends to blow up other ignition components including the stator. 

Part Numbers:

18-17300, 18-5743, 194-5279, 65W-81960-10-00, 8M0084173, 815279, 815279T, 8152793, 8152795, 830179T, 8301792, 854515, 854515T1, 856748, 883072T, 815279T, 830179A3, 815279


Effects of Water Ingress on Electrical Connections on Mercury 2-Stroke Outboard Voltage Regulator, Rectifiers, and Stators


Water ingress into the electrical connections of a Mercury 2-stroke outboard engine can have detrimental effects on the voltage regulator, rectifiers, and stators. The exposure to water can lead to various issues that can impact the performance and reliability of these components.


1. Corrosion: One of the primary effects of water ingress on electrical connections is corrosion. When water comes into contact with metal components within the electrical system, it can cause oxidation and corrosion to occur. This corrosion can weaken the connections, leading to poor conductivity and potential failure of the components.


2. Short Circuits: Water ingress can also result in short circuits within the electrical system. When water bridges the gap between two conductive elements, it creates a path for current to flow outside of its intended circuit. This can cause damage to sensitive electronic components like voltage regulators, rectifiers, and stators.


3. Insulation Damage: Water entering electrical connections can compromise the insulation surrounding wires and components. Insulation damage increases the risk of short circuits, arcing, and electrical fires. It can also lead to erratic behavior in the electrical system, affecting the overall performance of the outboard engine.


4. Reduced Efficiency: Water ingress can disrupt the normal functioning of voltage regulators, rectifiers, and stators. This disruption can lead to a decrease in efficiency in regulating voltage output and converting AC power to DC power. As a result, the outboard engine may experience power fluctuations or fail to operate at optimal levels.


5. Component Failure: Prolonged exposure to water ingress can ultimately cause component failure in the voltage regulator, rectifiers, and stators. The increased risk of corrosion, short circuits, insulation damage, and reduced efficiency all contribute to a higher likelihood of component failure over time.


In conclusion, water ingress on electrical connections in Mercury 2-stroke outboard engines can have severe consequences on critical components such as voltage regulators, rectifiers, and stators.


It is essential to prevent water from entering these connections through proper maintenance practices and protective measures to ensure the longevity and performance of the outboard engine’s electrical system.

20 AMP Voltage Regulator Rectifier

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