Where is the Mercathode?

KnotConnected

KnotConnected

Petty Officer 1st Class
Joined
Aug 15, 2012
Messages
221
I've got a 94 Larson Cabrio with the 7.4l Merc and Bravo3. After havig the lower unit rebuilt, in part because of corosion, I want to make sure all the anti-corosion measures are in place, however after looking through the bildge for a half hour this weekend, I couldn't find the Mercathode system that's supposed to be there.

Any tips for finding and testing it?
 
KnotConnected

KnotConnected

Petty Officer 1st Class
Joined
Aug 15, 2012
Messages
221
Re: Where is the Mercathode?

Yeah, this is the manual that I've been studying like the bible. If i understand correctly, the mercathode's electrode should be in the bilge, against the transom? (the diagram doesn't really give a good idea of what exactly you're looking at)
 
Don S

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: Where is the Mercathode?

The part inside the boat looks like this.

imagesqtbnANd9GcSFzrZU5UyCIYjwywCDc.jpg


The part on the drive is mounted to the bottom of the trim hose manifold on the bottom of the gimbal housing and looks like this.
Assuming of course the drive came with it from the factory.

98869A17.jpg



If the Mercathode was installed later, there may be two round sensors like this.

$(KGrHqEOKooE5kD5,1V-BOfLHRRR5Q~~60_12.JPG
 
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