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Steve Wastler · 07-14-2010, 07:50 AM

[QUOTE=Kurt in NJ;43785]Is it black carbon ---"I have gotten a dark brown goo that has drooled down the jet, and clogged it up, it only started happening in the past 3 years to me, something in the "new" gasoline when it evaporates leaves it."

Kurt,

I think you may find the 10% ethanol in the new unleaded is melting off some old carmelized gas in the tank and or gas lines.

The mail truck had sat for about 25 years with gas drying up in the tank. It was an almost hard molasses about a quarter inch thick over the entire bottom of the tank. I bought a couple of gallons of the E85 ethanol and poured in the tank. It works well to disolve the molasses, and doesn't need agitation.

I have added and drained 1 1/2 gallons let sit for a week and repeated twice, the molasses is just about gone and the tank is looking pretty good.

You may want to peer inside your tank, if you see any darkining on the bottom you may want to drain and give it a try. Just my two cents, It has worked for me.

07-14-2010, 07:50 AM	#5
Steve Wastler Senior Member Join Date: May 2010 Posts: 1,987	Re: Carbon buildup in carburetor [QUOTE=Kurt in NJ;43785]Is it black carbon ---"I have gotten a dark brown goo that has drooled down the jet, and clogged it up, it only started happening in the past 3 years to me, something in the "new" gasoline when it evaporates leaves it." Kurt, I think you may find the 10% ethanol in the new unleaded is melting off some old carmelized gas in the tank and or gas lines. The mail truck had sat for about 25 years with gas drying up in the tank. It was an almost hard molasses about a quarter inch thick over the entire bottom of the tank. I bought a couple of gallons of the E85 ethanol and poured in the tank. It works well to disolve the molasses, and doesn't need agitation. I have added and drained 1 1/2 gallons let sit for a week and repeated twice, the molasses is just about gone and the tank is looking pretty good. You may want to peer inside your tank, if you see any darkining on the bottom you may want to drain and give it a try. Just my two cents, It has worked for me.