Mercathode question

R

roger2015

Member
Jun 11, 2015
92
florida
Boat Info
1988 sorento s-21
Engines
350
image.jpg ok I am assuming this is the exterior part of my mercathode system, and I pretty sure that there should be a anode there... Correct, or no
 
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If you are referring to the blue block on the engine that has the 4 posts for mercathode then no the trim sender wires do not got there....It is a positive and negative from the battery and the other two wires go to the outside of the boat.


I notice you have your boat on a trailer....If you keep it out of the water on your trailer the mercathode is pointless to have.....It only helps when the boat is in the water slipped and not moving.
 
ASH said:
If you are referring to the blue block on the engine that has the 4 posts for mercathode then no the trim sender wires do not got there....It is a positive and negative from the battery and the other two wires go to the outside of the boat.


I notice you have your boat on a trailer....If you keep it out of the water on your trailer the mercathode is pointless to have.....It only helps when the boat is in the water slipped and not moving.
Click to expand...

Ok so where does the trim sender wire go, can't find the over end like the trim limit side


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There also a Solenoid on the back side of mercathode


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OK, that solenoid is the starter slave solenoid and has nothing to do with the Mercathode system. The trim sender wires go to the trim gauge on the dash, the trim limit switch wires go to the trim pump. The Mercathode wires go to the Mercathode control module (the blue block.) The pic you posted shows the trim sender wires I believe routed by the Mercathode controller but not attached to it. They simply used the Mercathode as a place to attach the wires en route to the dash. Also, if you have a zinc block on your transom housing, you don't have a functioning Mercathode unit on the boat. A previous owner may have removed it and went to zinc if he kept the boat on a trailer or had a bear of a time trying to install a new Mercathode unit on the transom housing. It can be a bit difficult as mine was this spring.
 
SCORPIO said:
OK, that solenoid is the starter slave solenoid and has nothing to do with the Mercathode system. The trim sender wires go to the trim gauge on the dash, the trim limit switch wires go to the trim pump. The Mercathode wires go to the Mercathode control module (the blue block.) The pic you posted shows the trim sender wires I believe routed by the Mercathode controller but not attached to it. They simply used the Mercathode as a place to attach the wires en route to the dash. Also, if you have a zinc block on your transom housing, you don't have a functioning Mercathode unit on the boat. A previous owner may have removed it and went to zinc if he kept the boat on a trailer or had a bear of a time trying to install a new Mercathode unit on the transom housing. It can be a bit difficult as mine was this spring.
Click to expand...
does it matter which one of the wires goes to the blue block from the trim sender, the connectors are bullet type from factory on the trim sender and the connection from the old sender on the mercathode have eyelets connectors, I was going to splice using waterproof connectors to make it easier to connect....thanks for getting me this far
 
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Before you go cutting ,what type of connectors are on the trim limit switch wires
If you actually have the trim sender wires, it dosent matter. one goes to the gauge and one goes to ground
 
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one side is male and the other is a and the other side is female bullet type connector
Bt Doctur said:
Before you go cutting ,what type of connectors are on the trim limit switch wires
If you actually have the trim sender wires, it dosent matter. one goes to the gauge and one goes to ground
Click to expand...
 
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