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Bubbling Fuel

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Andrew

08-06-2002 12:20:11

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Hi!
Yesterday, I switched off my TEA after doing some light carry tray work around the house. I noticed a "shhhhh h" noise coming from the fuel tank breather, I took the cap off and the petrol was bubbling from the heat! I had not been working it that hard surely! The block was very hot to touch.
Is this normal, is the cooling system kaput?
Any help would be appreciated!!!

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Boogity Ohio

08-07-2002 06:02:45

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Re: Bubbling Fuel in reply to Andrew, 08-06-2002 12:20:11

I have a '53 TO-30 that I just overhauled last year and it runs at about 160 to 180 degrees all the time. In hot weather mine always boils the gasoline. It has for many years. Not a problem.

If you are very concerned you can make a heat shield out of a long, narrow strip of sheetmetal and "U" bolt it to the throttle rod between the fuel tank and the exhaust manifold. You must trim this shield carefully to miss all engine parts when the throttle rod rotates. I made one about 10 years ago and it worked very well but I don't think it's necessary.

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Joe in NY

08-06-2002 20:23:42

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Re: Bubbling Fuel in reply to Andrew, 08-06-2002 12:20:11

Andrew,

Couple of things to think about: 1)Ignition timing 2)Carburation - to lean? 3)Proper plugs
Mine did the same thing and the cooling system was top notch. Timing can cause high exhaust temps as can to lean a fuel mix. Mine was a combination of fuel mix and plugs. I also have a TEA. Maybe it's more sensitive to settings with the standard engines. I hav'nt heard of to many problems like this with continentals.
Just a thought,
Joe

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marlowe

08-06-2002 19:19:48

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Re: Bubbling Fuel in reply to Andrew, 08-06-2002 12:20:11

there has been post on this be for and it is not uncomon for the fuel to bubble if the fuel is low in the tank it's just that not every one looks in the tank to see it. next time you get low on fuel after working it just look but be carfull don't smoke and you will see bubbles

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Fergie Fan

08-06-2002 18:35:10

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Re: Bubbling Fuel in reply to Andrew, 08-06-2002 12:20:11

Something is wrong , those babies get warm , but should not boil the fuel tank . Check your cooling system stem to stern , ours is 50 years old , works hard , never does that . Check your rad , make sure your fan belt is tight , fluid in rad and thermostat , most do not have temp gauge .

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drizler

08-06-2002 13:35:10

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Re: Bubbling Fuel in reply to Andrew, 08-06-2002 12:20:11

For years I have beat the snot out of mine. I really need a 40HP but balls to the wall with the TO-20 seems to get things done. Mine never gets the gauge up to over 150 degrees. You better check out the rad, fan, belt and water level and watch it carefully next time you use it. May be that your rads cooling fins are full of vegetation or some such easy fix.

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