Video on Zenith Carburators 35/40 --67' 250S

[flacollect]

Hello,
Is there a video on how to rebuild, and tune a zenith carburetor? I have a 67' 250S, and I need to see how it's done. Anyone know of any videos available? Thanks.

Dave

flacollect@comcast.net

[Bcollia]

I second the request!!!

[jimrice]

I third the request

[JMela]

https://youtu.be/7-bMXv_N-Vg

Good - thorough, multi-video Zenith rebuild...
Bad - ...in Spanish.

[JeffreyNMemphis]

English... But not specific to your 250S. For what he charges to rebuild a carburetor, you can probably get him to video it for you.

[barry12345]

Personally because of the time to knock them down and put back together and money for the kits. If the car had been running well the last time it was used. Usually the new issue is dried gas residue in the passages.

I fill the carbs with laquer thinner. First I run the engine to drain the bowls out of gas though. Although this is not really required if all the old gas has evaporated with time. Then breaking the fuel line connection in the area of the drivers footwell underneath the floor. I put a hose into a quart of laquer thinner .

. Then after cranking and refilling the carbs with the thinner. I remove both idle jets and watch for the fuel to start flowing out of the idle passages. Usually starts to occur in about 20 minutes to an hour.

The engine will run on the thinner by the way later. Anyways stop the engine cranking as soon as you feel the carbs bowls are full. The thinner is flammable so use your head.

I started doing this years ago because I have cars with the zenith carbs and they gum up sitting. Really the carbs should be filled with light oil to sit for long periods instead of left with gas in them. But life gets in the way and I just do not want to have to knock the carbs down every time I experience this. You have to use a little logic and keep in mind there are many other problems that cause carb issues. Still if they worked well the last time the car was in service this can get the dried gas residue and gum cleaned out of them cheap and fast.

If it does not work for you there is nothing lost. It usually does work in our experience so far.

We have a family have been doing this for almost forever. Some carbs seem to require a greater in situ soaking. So far no damage of any sort has occured but I do not like to internally soak a carb that is together longer than actually needed.

I also found that in some cases on carbs we have never done this on. The carbs run even better than they did before they were exposed to the first cleaning a long time ago.

Take it for what it is worth. My earliest thought years ago that the floats might be damaged has proved not to be our experience even once yet. My son in law last week had to soak his four wheeler carb for two days before all the passages cleared. . Since he never follows instructions well. He just diluted the gas and the concentration of the laquer thinner was substantially reduced.