Running Fuel out of Carburetor on 15hp Johnson

Discussion in 'Outboard Maintenance' started by tcjmiami, Apr 7, 2009.

  1. tcjmiami

    tcjmiami I Love!

    I actually read the manual for the new to me 2003 15hp Johnson that I just bought.
    I know it was just a momentary lapse of judgement :D. (-;

    The manual actually tells you to not run the fuel out of the carburetor after use.

    I have been doing this all my life when I did not plan on running an outboard more that a couple of days.

    Any feed back on what I should actually do?

  2. Brett

    Brett > PRO STAFF <

    Been thinking about this too,
    I always run my outboard's carb dry,
    if I'm not going out again the next day.
    Unless there's an automatic oil mixing system for a 2 stroke.
    My motivation is not just to prevent varnish deposits,
    but also to empty the fuel system of ethanol.
    I figure the less time the ethanol sits in my carb,
    the less damage is going to occur.
    I don't even know if a 2003 model is rated to run E10 gas
    without sustaining fuel system damage.

    Previous post:

  3. Frank_Sebastian

    Frank_Sebastian Well-Known Member

    Thats been out for a long time. Somewhere in my files I have an OMC newsletter or bullitan stating not to run the 2 stroke empty. I believe the reason was, the engine will still run when the oil in the crankcase has been depleted. I am considering welding a small coupling to the botom of the fuel bowl and then drilling a hole into it. A small pitcock or plug could be installed, then you could empty the bowl. A 10 second run should then clear the crankcase and not damage rings, rob bearings or top main. I want to find an old bowl for my engine first in case it turns bad.
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