How to place anodes

RussGW270

RussGW270

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So, made a mistake when I took the lower ends off.. I know.. shock.. anyway, I forgot to mark the placement of the anodes. While they could use replacing, I figure to get another season out of them...what is the trick for placement on them?

R
 
Russ, can you be more specific as to which anodes you're talking about or what you mean by "tricks"? They're usually pretty straight forward, which is why I'm wondering what you're getting at - as it may be something that I'm not thinking of.

For replacement time... when they're about halfway eaten up. Definitely by the time they are 2/3 gone.
 
Welp, thought I remember having to offset the aluminum anodes on the fin of the outboards. They were not exactly on center when I took them off, if I remember correctly. I have not worked on an outboard in a few years so tend to triple check my memories..

These:


The two I have are not bad.. one has a couple small cuts on it, but not even 1/4 corroded, but was curious. Will google itbut as long as they are back on, it will be good.. heh.. but adjusting them, may have an effect, cannot remember.
 
I have not owned a twin setup before, lol.. so, is why I asked. Hell, did not know the engines rotated opposite of each other. See? Learning along the way :P

R
 
Gotcha. So, the normal thing to do with a normal-rotation prop is to rotate the aft end of the anode (the one under the anti-ventilation plate) to starboard. Or, looking down at the anode, rotate it CCW. It's not an exact science, but idea is to offset prop-walk (the prop wants to pull sideways due to rotation) and it can make the steering feel heavier in one direction. It's much less of an issue with twins (assuming the port side is a counter-rotating lower end). Play around with it - start with them straight and if you feel a difference in steering, go ahead and move them.
 
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Loverly.. now I am starting to question myself on whether I twisted the shafts the correct direction.. lol...Guess I will grab an extra impeller just in case I start it up and it shreds them.. heh.

Welp.. this is a learning experience. I was fortunate to only have a single engine all these years. Going to hook them up this Saturday. If they shred the impellers, will just swap those out..

Thanks Dennis.

R
 
If you have a twin set-up then they should be pointed straight back. The propellers rotation direction should counteract each other. In fact for my twin Yamahas they don't even sell the anodes with the fins anymore.
 
I looked at the impellers and they both were bent in the same direction, so they appeared to rotate the same direction (the shafts)...will watch when I start them.

R
 
You should have rotated the drive shaft clockwise looking down on it . That would have twisted the impeller vanes in the the correct direction.
As to anodes, with counter rotating motors, as mentioned the tab should be straight but even better is to buy anodes without tabs. They have less drag ( not that you would notice):)
 
I did rotate them clockwise. I think my helper clamed down vs allowing the impeller to make it's way into the housing and then he bolted that down while I got the other, so it got jacked up. Not a huge deal, all fixed now.

R
 
I use red locktite on these now (and let it cure overnight), as last year I had one let go. I didn't realize when it happened, but once I pulled the boat out it wasn't there. Make it tight! FWIW...
 
They remove them to service the lower unit and sometimes forget to torque them tight after re-install. Sand the contact area on the zinc well.
 
Remember, if you don't know! Ask your First Officer, they will!
 
You posted these model numbers in a previous thread, and there is no L for counter rotation. Are the props the same, or are they mirror images, as far as blade angle from the hub?
F225TXRC and F225TXRB
 
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