BF200/225 block mounted anodes

[m smith]

I keep hearing that there are a couple secret anodes mounted on the 200/225 blocks. These are supposedly not the 4 located on the exhaust manifolds. I have rebuilt my BF200, doing a block swap to remedy a rot hole in the water jacket. I do not recall seeing any anodes on the block. Granted, the block came as a built shortblock so I did not open the bottom end to examine the crankshaft or mains. Where exactly are these anodes located?

 

[chawk_man]

I've scoured the Helm manual and boats.net and have not found any additional internal anodes except the ones in the manifolds.

If anyone knows different, please jump in on this thread. I'm sure there are many interested.

 

[m smith]

There is nothing about them in the Honda factory service manual either. I have seen them mentioned by a few people in posts related to block rot issues.