Re: Fuel Bowl!!!

Posted by Alberta Mike on October 06, 2000 at 10:35:18 from (198.161.119.4):

In Reply to: Fuel Bowl!!! posted by Tim on October 06, 2000 at 09:33:07:

If it didn't leak before, then it must be something to do with the gasket seal. If you've used a new gasket, then it must be the casting surface(s) that are not correct. The surfaces could be warped (doubtful but possible, and a fix would be difficult). More than likely, the surfaces are irregular or pitted. Some people might suggest using some type of sealant (gasket goo, silicon, etc.) but that's not really solving the problem, although it might work (but brutal to take the carb apart next time). I'm not familiar with JD carbs but if there are no protrusions, you can file the casting surfaces flat with a good (new) fine flat file. Make sure the file is of a decent size.

An alternate method is to get a sheet of glass, lay it on your bench on a piece of cardboard, and use valve grinding compound between the casting surface and the glass and gently rotate the casting in a circular motion. The compound will squeeze out as you work so you'll have to keep adding more and moving some of the old stuff back between the glass and the casting.

If either carb half has a protrusion (like a fuel nozzle, etc.), then you're stuck with the filing method. Be careful with filing that you apply even pressure over the whole area and work carefully and slowly, and you'll be OK.

Last of all, occasionally I have had to cut a new gasket out of thicker gasket paper. Some gasket paper is very thin and won't seal up surface irregularities on old carbs. Finally, buy some new machine screws and scrap the old ones if they have poor heads. It sure helps to get a nice, new machine screw to twist in nice and tight to hold the two halves together. And make sure the machine screws are of a decent grade. Hope this helps.

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