Ethanol and engine parts- What needs to be replaced?

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apace2

Cadet
Joined
Apr 3, 2011
Messages
12
I just recently realized the need to have ethanol safe fuel lines. I was wondering about the lines associated with the fuel pump. Should they be replaced? What other lines, gaskets or valves need to be ethanol safe? I have a 1985 30hp Johnson.
 
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emdsapmgr

Supreme Mariner
Joined
Dec 9, 2005
Messages
11,551
Re: Ethanol and engine parts- What needs to be replaced?

Ethanol-based fuels will deteriorate any rubber in the fuel system on earlier engines. This includes the fuel lines to the engine, the lines under the cowling and the rubber bladder in the fuel pump. The very newest fuel lines from OMC have changed: they now have a special rubber inner liner inside the hoses. You will find the prices have also changed. Stay away from any 15% ethanol-blend fuels.
 
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F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,195
Re: Ethanol and engine parts- What needs to be replaced?

Your motor was built to run on 10% Ethanol. However, it is also 26 years old. The fuel lines need to be changed just because they are old, not because of Ethanol. I believe the new super expensive stuff is to comply with the new laws concerning permeability.
 
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