Crud in carb bowl

[robinfla52]

In order to sell my 2004 Yamaha 40ELPTO. I cleaned carbs ultrasonically. Clean as a whistle. Wire thru all holes. Replaced fuel pump, fuel filter. Sold to somebody who took about a month before he restarted. Now it won't stay running. Starts, idles fast then slows down and dies. I understand that is how it is supposed to be with primer system. He finally took top carb and bottom carb off. Bottom carb was full of crud but top was clean. He did not remove center carb because of primer assy. But I can only think that since I replaced fuel pump and filter that this crud came from a hose that remained even though it sure seems like a lot for one hose. He also noted bottom cylinder spark plug was wetter than he liked. Set air fuel screw out 1 1/2 turns. Do all carbs use same turns?
Any opinions would be greatly appreciated.

 

[flashback]

What's he wanting you to do? Carb in the Pic looks like it's been tossed in the sand..

 

[99yam40]

I would think it had water or some other stuff in the bowl to look like that.

what did you use to sonic clean the carbs?

I am having a hard time figuring out what a 2004 Yamaha 40ELPTO is.
that does not line up with anything here in the USA

 

[crazy charlie]

Did you replace the fuel/water separator?? If so ,which it sounds like you didn't, did you pour the contents into a clear jar to see what was in it??? Charlie

 

[wmgeorge]

Looks like water or crud from leaving Ethenol gas in the carbs. Those were taken apart and cleaned a month ago??