Honda Internal Zinc Anode

[gr84x4]

Be sure to inspect and replace the internal zinc anode on your Honda outboard motors. It is a small anode in the water jacket. It is so small that is goes fast if you spend any time in salt... I had to look long and hard online to find where it was located, but I found it. It is part #1 in the below diagram for a Honda 9.9. Honda make an internal anode for the larger motors (like a 150 or 225, however I have not found where they are located).

[fishin"G"man]

AH HA! I've been having some intermittent problems with "something" plugging the cooling circuit after twenty to thirty hours of running. It usually blows out with high pressure air. I figured it was a build up of calcium or salt despite the use salt terminator. This will be the culprit I'd bet. I'm going to "my favorites" to find the part number right now.

Thanks a bazillion!!!!

Originally Posted by gr84x4

Be sure to inspect and replace the internal zinc anode on your Honda outboard motors. It is a small anode in the water jacket. It is so small that is goes fast if you spend any time in salt... I had to look long and hard online to find where it was located, but I found it. It is part #1 in the below diagram for a Honda 9.9. Honda make an internal anode for the larger motors (like a 150 or 225, however I have not found where they are located).

[gr84x4]

Let me know how easy it is to open up and replace. I have not tried it on my own yet.

Jason

Originally Posted by fishin"G"man

AH HA! I've been having some intermittent problems with "something" plugging the cooling circuit after twenty to thirty hours of running. It usually blows out with high pressure air. I figured it was a build up of calcium or salt despite the use salt terminator. This will be the culprit I'd bet. I'm going to "my favorites" to find the part number right now.

Thanks a bazillion!!!!

[fishin"G"man]

Will do. So far I've been too daggon busy to get around to it. I have some fears about salt and broken bolts. Hopefully there will be no issues. Taking it slow and easy will be the case. I'm not sure I will replace that zinc for as much trouble it has caused me and the (proposed) trouble getting into it.

[gr84x4]

Looks like a real PITA. If you can, take some photos of the process and post them so we can see how it goes.

[fishin"G"man]

Pics of the process I can't help you with (I'm electronically challenged in that aspect) but an update of how it went and a blow by blow I can help with.

This weekend is when I hope to attempt the challenge. Lots on the plate so here's hoping! My thought is take it out and leave it out. WAY to difficult to get at every year. I flush with fresh water and use salt terminator faithfully so I'm not expecting trouble by removing it. Fact is I'm removing the problem (or at least I suspect I am).

[gr84x4]

Yeah, post a blow by blow if you can. Also, be sure to tell us what kind of shape the anode is in.
Can you tell me more about the salt terminator you use? I have not used any before. Do you spary it on for flush it in the motor?

Thanks,
Jason

Originally Posted by fishin"G"man

Pics of the process I can't help you with (I'm electronically challenged in that aspect) but an update of how it went and a blow by blow I can help with.

This weekend is when I hope to attempt the challenge. Lots on the plate so here's hoping! My thought is take it out and leave it out. WAY to difficult to get at every year. I flush with fresh water and use salt terminator faithfully so I'm not expecting trouble by removing it. Fact is I'm removing the problem (or at least I suspect I am).

[fishin"G"man]

Originally Posted by gr84x4

Be sure to inspect and replace the internal zinc anode on your Honda outboard motors. It is a small anode in the water jacket. It is so small that is goes fast if you spend any time in salt... I had to look long and hard online to find where it was located, but I found it. It is part #1 in the below diagram for a Honda 9.9. Honda make an internal anode for the larger motors (like a 150 or 225, however I have not found where they are located).

Ok finally getting back to tell the story about my zinc finding expedition...

This was an easy job and very simply completed. Start to finish it took about a half hour. I was careful with the gasket and didn't need to replace it. As for the fuel hoses attached; they came off easy too. I didn't pull the carb off but I did detach the linkage. No trouble with "frozen" screws anywhere and on reassembly, anti seize was applied to assure the same the next time.
I found the anode screwed to the cover not the block as pictured. Even so that screw came out without any problem by grabbing the anode (Zinc) with pliers and turning it out with fingers once loose. If I were to replace it it would be more simple to get the screw and anode.

I left mine out despite the fact it really didn't look as bad as I figured it would. As for the plugged up system... nothing seen nothing found inside. I did find the pee hole hose was plugged. Sure had me wondering because it did steam up. As soon as I attached the flush and turned on the water I had a good stream at the pee hole. Job complete and like I said... simple.

[gr84x4]

I went to change this anode today, and could not get the screw out. Any ideas on how to do it? I did not want to strip the screw. I thought about using some WD-40. I just put everything back together as the anode was 97%.

[socket985]

Hi,

There is a tool that designed just for tough things like that. Here is a link that should work for you.

http://www.amazon.com/Impact-Screw-D.../dp/B001ABIJV0

You strike the end with a hammer which will apply a impact force with a twist to remove screws that won't budge.

Good Luck