milky gas, water?

[cookiedoh]

I have a 89 115 Yamaha. Stalled, runs on starting fluid but won't stay running. I noticed in the sight glass of the inline fuel filter that it was milky. Had heavy rain and high humidity so I'm thinking water in the gas. Pulled the carb drain plugs, pumped new gas through. Took almost 1/2 gal before it finally turned clear. Started it up and now it idles at 3000rpms. I disconnected the linkage on the throttle cam, still idles at 2000rpm with throttle fully closed. What's my next move?

 

[99yam40]

Re: milky gas, water?

give us more history on the motor and when it last ran great.
Did you drain and clean the tank. lines. fuel pumps, and carbs?And then put in fresh fuel and oil?
I would never use starting fluid on a 2 stroke motor. There are ways to test things instead of trying to run a motor without lubrication.

 

[cookiedoh]

Re: milky gas, water?

Ran great last week (before heavy rain) I drained carbs, removed inline filter and pumped the bad gas out that I could get (there was still probably some in the lines between fuel pump and carbs) Put new gas in a different tank, pumped it by hand with the drain plugs removed until the gas dripping from drain plugs was clear. Good point on starting fluid, although I'm still using oil injection so I believe it still would get oil. I was using it to try and get back to the harbor before I got someone to tow me in. I did not put new oil in...?

 

[99yam40]

Re: milky gas, water?

to idle high it could be the timing is advanced to far at idle, throttle plates or linkage open to far.

I would pull and clean carbs along with the pumps, lines, and tank. and start from scratch on resetting the linkage and syncing the carbs.

Milky fuel sounds like phase separation of the fuel and all that needs to go.

 

[cookiedoh]

Re: milky gas, water?

How would you go about cleaning the fuel pump and fuel lines? I just pumped it through until the milky appearance went away. It was a pretty drastic difference between milky and clear.

 

[99yam40]

Re: milky gas, water?

The pump I would take apart and clean. the lines I would blow out with air and see if you could pull a small piece if cloth soaked in seafoam or some other product like it through on a string just to make sure there was no trash fixing to hit the carbs again after the clean. but its up to you to do what you feel