Mercruiser Mercathode checking

[jamie langstone]

I have a mercruiser Mercathode how do i check to see if it is working correctly.

 

[TheOrs]

I have a mercruiser Mercathode how do i check to see if it is working correctly.

Have a read of this: http://www.boatingwithtr.com/Members/PDFs/7a_28.pdf page 7A-19 onwards
&/or this: http://www.boatfix.com/merc/servmanl/14/14a7.pdf page 7A-20 onwards.

Then buy or borrow one of these: http://www.ebay.com/itm/36098793521...iewitem=&sspagename=ADME:L:OC:GB:3160&vxp=mtr (about £100 delivered).

Darren

 

[VicS]

I have a mercruiser Mercathode how do i check to see if it is working correctly.

You will need a Mercathode reference electrode and a digital multimeter or a Galvatest electrode and multimeter or a Galvatest kit

See http://www.boatfix.com/merc/servmanl/14/14a7.pdf

and http://www.galvatest.com/

 

[GrahamHR]

You will need a Mercathode reference electrode and a digital multimeter or a Galvatest electrode and multimeter or a Galvatest kit

See http://www.boatfix.com/merc/servmanl/14/14a7.pdf

and http://www.galvatest.com/

The Volvo Penta one seem simpler to check.

1. One green led lit, it's working fine,

2. Green and red LED lit; working at maximum.

3. Red led; not protecting.

Until I fitted aluminium anodes, mine ran at level 2. Now with aluminium ones it is at level 1.

 

[TheOrs]

The Volvo Penta one seem simpler to check.

Good point! Mercury also do something similar but it's an optional extra and doesn't seem to have been fitted to many boats.



You (the O.P.) could buy one (http://stores.outboardparadise.com/86300a1-mercathode-monitor-new-nos/ or http://www.ebay.com/itm/Vintage-Mercury-Mercruiser-Mercathode-Monitor-Kit-86300A1-/321916783470) and fit it. I don't know how 'clever' the Volvo Penta version is but Mercruiser's monitor only really tells you that your controller is trying to drive the cathode; which doesn't necessarily mean it's working correctly or give you the full story. Could be a simpler way of checking out your MerCathode though if you can find one for sale locally.

Darren

 

[jamie langstone]

Thanks for the info a real help.

 

[lynall]

The Volvo Penta one seem simpler to check.

1. One green led lit, it's working fine,

2. Green and red LED lit; working at maximum.

3. Red led; not protecting.

Until I fitted aluminium anodes, mine ran at level 2. Now with aluminium ones it is at level 1.

I noticed the other day that mine is back to one green led now its got new anodes fitted.

 

[mlines]

1. Take boat fitted with fresh water anodes and stainless steel props to Hamble for a weekend away
2. Leave overnight in water
3. Remove boat from water, check that the anodes have disappeared and the prop has been plated



You can guess how I found this out. I thought it would be ok for a night