Oman generator corrosion

[SEARANGER ANCASTER]

Is this lack of bonding/anodes ?

 

[jfm]

Is this lack of bonding/anodes ?

The local anode is right there in the pic - brass hexagon at side of heat exchanger. Is there any zinc left?

Looks to me like you have a weeping leak from the end cap of the heat/ex, and due to the warmth in there the leaked water dries off leaving a pile of salt. No big deal. Easy to fix by cleaning or changing the gasket for the end cap

If that's correct then you do not have a bonding problem.

 

[Bandit]

We had a boat with an Onan generator in this year with corrosion on the cooler, the end caps were badly corroded as were the seal seats, I don't think the anodes had been regularly changed we ended up replacing the whole cooler.

 

[SEARANGER ANCASTER]

The local anode is right there in the pic - brass hexagon at side of heat exchanger. Is there any zinc left?

Looks to me like you have a weeping leak from the end cap of the heat/ex, and due to the warmth in there the leaked water dries off leaving a pile of salt. No big deal. Easy to fix by cleaning or changing the gasket for the end cap

If that's correct then you do not have a bonding problem.

Further investigation. Revealed some blue furriness on a temp switch on the exhaust too. Ran out of time so will take the plug out and see if any anode left but I suspect not.

 

[ARE]

Further investigation. Revealed some blue furriness on a temp switch on the exhaust too. Ran out of time so will take the plug out and see if any anode left but I suspect not.

I would say that this is a result of a leak from the hose going upwards, the hose is not a oridgnal Onan item so I would guess you have a anti siphon valve fitted?

PM me if you want a replacement heat exchanger, as I have some removed from new generators.

Regards Anthony

 

[Imperial One]

The local anode is right there in the pic - brass hexagon at side of heat exchanger. Is there any zinc left?

Looks to me like you have a weeping leak from the end cap of the heat/ex, and due to the warmth in there the leaked water dries off leaving a pile of salt. No big deal. Easy to fix by cleaning or changing the gasket for the end cap

If that's correct then you do not have a bonding problem.

+1
Looks like a case of a quiet word in the ear of the last guy to service it may be needed.

 

[SEARANGER ANCASTER]

+1
Looks like a case of a quiet word in the ear of the last guy to service it may be needed.

Last service was when it was in Spain and I do my own , did both engines etc at start of season and I have only just got round to generator after having the boat a year. I checked oil and it was clear when I bought the boat so wrongly assumed that everything else would be hunkydori to get me through last season. We live and learn !

 

[Imperial One]

Hmmm, I know how you feel George, have just been experiencing the result of some (lack of proper) Spanish maintenance issues myself - cannot say too much as there are some good guys out there as well!
Hope all else is good with her though.
Mike.

 

[SEARANGER ANCASTER]

I would say that this is a result of a leak from the hose going upwards, the hose is not a oridgnal Onan item so I would guess you have a anti siphon valve fitted?

PM me if you want a replacement heat exchanger, as I have some removed from new generators.

Regards Anthony

ARE - Top man !