Offshoreonly.com - Mercathode Controller

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Mercathode Controller

Old part number 42600a3 new part number 42600a09 what is the extra white wire for on these ??

I wish I could help you - I checked in my repair manual - however this is what it said - there is no mention of a white wire - We have a 2000 7.4 mpi all stock

a - ORANGE Wire - From Electrode On Transom Assembly

b - RED/PURPLE Wire - Connect (Other End) to Positive

(+) Battery Terminal

c - BLACK Wire - From Engine Harness

d - BROWN Wire - From Electrode on Transom Assembly

3pointstar

Possibly the white wire found on the black box (vs the old blue control box) is a connection point for the latest type of Merc's MerCathode corrosion monitoring system that on some models seem to be using a green flashing light to help let the user know if the system is working correctly or not as indicated in the following video from Mercruiser,

Hum Well I cannot seem to be able to make the You Tube video work above via a link so you'll have to search online ( MerCruiser 4.5L / 6.2L Sterndrive - MerCathode System ) and watch the video if the following two tries don't show up either.... https://www.bing.com/search?q=MerCru...R&pc=EUPP_DCJB

https://www.bing.com/videos/search?q...4EEA&FORM=VIRE

Quote:

MerCruiser Blue (Now black) Mercathode control unit.Part Number: 42600A09

Blue control unit. Fits R, MR, Alpha One & Gen II, and Bravo drives.

Please note that as of June 2016 the casing is now black in colour.

The operation of the unit and part number have not changed.https://www.ebay.co.uk/itm/Mercury-M...-/161178203930

http://i.ebayimg.com/images/i/140843...-1/s-l1000.jpg

Quote:

Originally Posted by lakematdude (Post 4597820)

Your vid link is above.

For some stupid freakin reason most links don't show up on this site until they are quoted.

Does the new one cast a more powerful field than the old. Most posts I've seen wound up with the owner requireding 2 per engine to make a field powerful enough to prevent corrosion. Testing for field is a PITA too.