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Mercathode The Mercathode is a device that helps protect against Galvanic Corrosion. Most newer Mercruiser Engine Packages (with the exception of the 4 cylinder models) come standard with an installed Mercathode Antigalvanic Corrosion System. The Mercathode system has two parts; the Controller and the Anode. The Controller is located in the boat and it's usually mounted on the engine. The Controller sends a signal to the Anode which develops a protective field around the sterndrive unit to protect it against gal;vanic corrosion. It should be wired directly to the batteries positive terminal with the included in-line fuse. The Mercathode must stay powered up even if the battery switch is turned off. There are four color coded wires attching to the Mercathode Controller. One is RED for positive power. Another wire is BLACK for a negative ground supply. One wire is ORANGE and yet another is BROWN. These ORANGE and BROWN wires run down to the Anode device on the bottom of the gimbal housing. The Anode is mounted outside the boat on the very bottom of the gimbal housing assembly. It is a black plastic device which is held in place with two bolts. The Anode is what produces the invisable protective field around the drive unit. The Anode must be kept clean and should never be painted. The Mercathode will drain your boats batteries. The harder it has to work the faster the drain. If you are keeping your boat in the water you NEED to keep a battery charger on the battery or the battery will go dead and you could sink the boat. Make sure you use a marine rated fully regulated and fully rectified battery charger. If you keep your boat in the water and you dont have a Mercathode, GET ONE. They are not too difficult to install and the whole Mercathode Kit is only about $119.00 Safety Boats can explode. Moving parts can rip off your fingers. Hot exhaust can burn you to the bone and props can slice you up. One spark near a battery can cause an explosion. You can never be too careful. Remove the battery from the boat before working with fuel. Always disconnect the batteries negative terminal first. Clean up any spilt fuel and let ALL of the fumes dissipate before installing the battery and starting the motor. Pulleys and Belts can grab your clothes and hair. Don't wear loose clothing and keep your hair up under a hat. Always wear safety glasses. Be smart.

Sterndrive-Information Change your Alpha Gear Lube Change your Bravo Gear Lube Why does my drive lube have white streaks? Why does my drive lube have gray mush? Replace Your Alpha One Water Pump Replace your Alpha Gen II Water Pump Rebuild your Bravo Raw Water Pump Troubleshoot & Replace your Alpha Shift Cable Troubleshoot & Replace your Bravo Shift Cable Replace your Alpha One Bellows & Gimbal Bearing Replace your Alpha Gen II Bellows & Gimbal bearing Replace your Bravo Bellows & Gimbal Bearing Why does my drive "Growl" when I turn? Water is leaking into my boat from the transom Replacing your Trim Sender Switches My Trim doesn't work but my Trailer Switch does My Trim Gauge is Pegged Rebuild your Alpha One Upper Driveshaft Housing Assembly Rebuild your Alpha One Lower Gear Housing Assembly Check your Engine Alignment Check for Excessive Steering Play Troubleshoot an Overheating Problem Should I remove my thermostat? Why do I overheat when going fast? Troubleshoot a No-Crank Condition Troubleshoot a No-Start Condition My Engine Backfires and/or Surges and has Lack of Power What is an Anti-Syphon Valve? My Engine blows Steam from the Exhaust Why do I hear a "clakity" sound while at idle? Exhaust Manifolds...IMPORTANT Information How do I Winterize my engine? What is Galvanic Corrosion? I have a Bravo III Galvanic Corrosion Problem What is a Mercathode? All about Zinc Anodes How do I check my carburetor? What carburetor do I have? A Rochester or a Mercarb? I have water in my fuel My fuel smells like varnish My fuel is old My engine has been sitting for several months without being run. I have a Mercruiser 470, 485, 488, 190, 3.7L Engine I have coolant dripping from the front of my engine Can I install a regular Alternator instead of the Stator-Rotor? Converting an OMC to a Mercruiser

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