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GLADES

Black outboard L/U stains

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On the lower unit of the outboard housing, right at the waterline, my 150 merc motor has developed white stains that I cant remove.

I looks like algae, but it isnt.

Have any other merc owners had this happen and any advice for cleaners, etc?

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If it is hard water lime deposits, try a little Lime Away.  I use it on the motor when mine gets that way.

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