1975 evinrude 40 hp 4005c lower unit

brickman64

Cadet
Joined
Aug 7, 2010
Messages
13
I was adding gear oil to my lower unit this morning when i noticed oil running from my water intake. Is it a seal , to much oil or what?
 

Daviet

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Sep 24, 2008
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8,958
Re: 1975 evinrude 40 hp 4005c lower unit

Is it lower unit oil or unburnt engine oil, not uncommon for unburnt engine oil to drain from the exhaust housing.
 

brickman64

Cadet
Joined
Aug 7, 2010
Messages
13
Re: 1975 evinrude 40 hp 4005c lower unit

Well being a 2 cycle engine I would think it is gear oil it is not dark like 2 cycle oil. When I first noticed my first reaction was to add oil to lower unit,and while I was adding it oil started flowing from the port just above the port
 
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