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billnpat
12-04-2009, 02:42 PM
Im confused again...:huh: Am I I/O ??

My engines are MERC CRUISERS V-8 300 HP [E] 350 CID
MODEL....350 HORIZON MPI..V-DRIVE...I found this in search threads about zincs...and whether they should be a concern to my 310....:

For all: Just got an answer from my marina (mechanic). Mercruiser does not put the pencil zinc anodes in thier engines. Boats with inboard/outboard configuration have the Mercathode (Cathodic Protection System) installed and that is connected to the "outdrive" of the I/O. True inboards, with V-Drives and shafts, do not have the internal engine zincs. Like said, the engine/shaft, are protected by the hull/transom zinc, and you should put "shaft" zincs on if you don't have them. Sea Ray "does not" install shaft zincs on any of their boats, but many mechanics have told me, to put them on for your own protection. They cost like $12 each, so put one on each shaft about 10" out from where the shaft extrudes outside of the hull.

Question....Am i inboard/outboard ??

Question Do i have (Cathodic Protection System)?????

thanks....:huh:

rcknecht
12-04-2009, 02:57 PM
You have Inboards with "V" drives... I believe the Mercathode system is only with Stern Drives, but I am not absolutely sure...

mwph
12-04-2009, 03:01 PM
I think this will answer your second question of "Do I have protection?" The system is for sterndrive units wich you do not have. Hopefully some V Drive guys will chime in on proper placement of any zincs you may need. Remember too that water type (salt/fresh) determines the type of "zincs" you'll need. The site I linked to below is a great resource for me in learning about galvanic corrosion. Hope this helps.....

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

Text from... http://www.outdriveshop.com/mercathode.html

Lazy Daze
12-04-2009, 03:03 PM
Bill, a "V" drive is a little misleading. If I may, I think the word "drive" is what is confusing you. The "V" simply relates to the shape of your prop shaft, when looked at from the side. If you notice, your shaft comes out of the engine going forward, then makes a "V" bend and exits the hull. A "Straight" inboard would have the engine closer to mid-ship and the prop shaft will exit the engine going aft and continue, straight, out of the hull.

For most things, you can consider the two systems basically the same.

billnpat
12-04-2009, 06:06 PM
Well i'm not a newer engine owner so i guess im not protected ....
They told me today at M.M. that any Zincs needed for my boat will be installed upon being launch in the spring..

billnpat
12-04-2009, 06:07 PM
Bill, a "V" drive is a little misleading. If I may, I think the word "drive" is what is confusing you. The "V" simply relates to the shape of your prop shaft, when looked at from the side. If you notice, your shaft comes out of the engine going forward, then makes a "V" bend and exits the hull. A "Straight" inboard would have the engine closer to mid-ship and the prop shaft will exit the engine going aft and continue, straight, out of the hull.

For most things, you can consider the two systems basically the same.

YES! Thanks for clearing that up for me...:thumbsup: