Home › Forum › Ask A Member › Neptune Outboard afraid of water › Re: Neptune Outboard afraid of water

#13494
Buccaneer
Participant

    US Member

    Well, I doubled the oil mix on the Neptune and fired it up in the
    test barrel, and learned a few things!
    #1- I’m an idiot (Yesterday when I thought the throttle valve was closed, it was wide open)
    #2 – When running an outboard with a 5:1 fuel mixture, the wind always switched directions,
    blowing Chinese like smog in your face!
    #3 – The throttle keeps working itself open if your hand isn’t on the grip. (is there suppose
    to be a spring on these twins to prevent that?
    #4 – The exhaust noise is objectionable after 20 minutes, when there’s no exhaust tube attached.
    All said it done, it ran for twenty minutes without dying. I wouldn’t can it "smooth", but
    it did idle down fair. Without a prop on, I couldn’t really do any "high speed" tuning.
    I may recheck the compression for kicks to see if it’s come up any from 60 psi, after
    it’s total of 25 minutes running. I’ll put the exhaust tube and prop back on and try again
    when it gets nicer out. Twenty mile an hour wind and in the thirties is not my idea
    of fun. The Neptune did pump water nice, and cylinders ran cool to the touch, but
    of course my test tank had 1/8" of ice on it this morning!

    Prepare to be boarded!