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Old 27 April 2009, 14:38   #1
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Honda O/board corrosion

Would really appreciate any input/similar experience & remedies here folks.
I have a Honda 45hp BF45A o/board and as you can see from the pic below and the area circled, theres a corrosion problem
1 has anyone else experienced this with a Honda
2 What caused it
3 What do you call the component
4 Can it be removed easily/repaired


A friend has a 30hp model and its similarly affected
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Old 27 April 2009, 16:19   #2
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Any chance of getting a larger pic of the part?

jky
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Old 27 April 2009, 16:29   #3
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This any better..?

Quote:
Originally Posted by jyasaki View Post
Any chance of getting a larger pic of the part?

jky
Try this pic, can't seem to edit original post
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Old 28 April 2009, 04:10   #4
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I can't see the picture?

Most corrosion on outboards, especially when used in a salt-water or brackish environment is caused by 'electrolysis'. Basically certain metals and alloys will corrode quicker in water due to the electric charge being generated by the engine.

A way to minimise electrolysis is to ensure the sacrifical anode (normally made of zinc) situated above the propeller (trim tab) is replaced when its deteriorated sufficiently. Otherwise the corrosion will eat into the outboard itself.

The paint under the sacrifical anode should be intact. Good maintenance of the outboard will help, regularly washing down with fresh water, greasing nipple points, etc. Repairs on bare metal should be treated quickly, primed and repainted.
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Old 28 April 2009, 05:56   #5
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It looks like the steering arm to me. And it is normal corrosion for a steel part. There's not much you can do to protect it, although a rub down and coat of waxoyl or similar would help. It won't be very easy to remove, without removing the whole engine AFAIK
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Old 28 April 2009, 11:19   #6
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Yeah, it's one part that has to be steel to handle the abuse it will see, and as Erin says, a pain in the @rse to get at when it starts to loose paint. One thing to check is your anode(s). There are usuall two, one under the cav plate that usually takes care of the leg etc, and another on the bottom of the clamp.

My old yam (here we go again...) had the clamp anode totally dissolved & the trim tab one half the size it started when I got the engine, and the tiler arm was flaking sheets of rust off!The rest of the engine looked OK, but we all know the rest of that saga.....

Also look at the short electrical connection wires between all the main lumps of your clamp / swivel / leg etc - if one of them has lost contact (corrosion, snapped wire etc) your anode will be as good as useless......
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Old 02 May 2009, 14:22   #7
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