Re: 1957 Johnson 35Hp Seahorse oil discharge in water

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May 27, 2018 at 11:46 am #76801
jerry-ahrens
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    All of what you have described is normal. Actually, any modern 2 stroke outboard motor will do the same thing when ran in a barrel, trash can, test tank, etc. That black stuff is unburned fuel/oil mix that exits the motor through the exaust. As for the smoking, that is the 24/1 fuel mix. DONT try to use less oil… these old motors smoke, nothing to worry about.