whats up with this carb?

so there is a hole on top of this thing. it looks factory but gas comes out of it occasionally. I dont think it serves a purpose so id like to seal it up. also does anyone know what kind of carb this is? there is a whole lot of numbers on this thing

needle & seat stuck open!!!!!!!!!!!!!!!!!!!! kit the carb & look 4 bad rubber fuel lines also or trash in system/tank

?

So, looks like you got one of a couple different stock carbs for our inline six cylinder engines. This is a 1bbl Yf carburetor. Probably YF 4375s or 4376s. I have a similar carb on mine but I recently messed up the threads on the fuel inlet...a whole other story. The hole on top I've never messed with that I can remember but there should be a screw hiding in there. I believe its to adjust the float from the outside...but I dont quite remember. Get a kit and rebuild that thing. You'll do it a lot of justice. Plus I'm sure the kit instructions will tell you what that hole and screw are for. When I went to rebuild mine it was a smooth difference. The float adjustment is important.
...oh just saw donivan beat me to it. There you go.
-66BeachCruiser

Hey Donivan,

Yup, I messed up the threads in the carb. KookyKrispy had recommended me this link for an Extended Thread Inlet fitting. http://quadrajetparts.com/rochester-quadrajet-parts-quadrajet-inlet-fittings-650-extended-thread-inlet-fitting-p-482.html

I haven't ordered any fitting yet. I was hoping to find something local first.
Would that be the same thing you're talking about or is their a fix to the housing?

-66BeachCruiser

Thatcherworks, Here's a picture of a diagram of when I rebuilt mine. Just to have another glimpse of its components. That component with the spring on Donivans picture is the pump diaphragm assembly. Vent seems to be right next to it. Can't see that on the diagram though.

This one is mine. Well, seems like I got the high bowl vent.



I don't seem to have the know how to post the proper size pictures here. If the picture is visible you can see the threads that are messed up and the good threads remaining.

Donivan, you brought me a smile with that autozone link Now that does look more promising. Can't wait to give that a try. Will try tomorrow I hope and check in to tell results. Resized my carb picture and I hope to resize that diagram also.

you guys are great. thanks! Im planning on building a cold air intake for this puppy and noticed the hole when i was checking for clearances. it only leaks when starting occasionally but thats not very safe so i will rebuild it.

so i looked and its in there. I think its just cranked down. i also found the numbers for the thing. they were on the drivers side with not a lot of viewing room. its a 4368s

Since its the same carb lets continue here on the carb threading fix.

So the autozone Self-tappping carburetor fittings were purchased. They are the right size for this carburetor. In the descriptions it says it is an assortment of 5/16 and 3/8. It is really a pack of two carb fittings of those sizes. These are not in store and are a special order item. I ordered them on Wednesday and got them after work Friday.

It says to apply a light lubricant to the threads. I used household oil. Next it says to insert the fitting into the hole by turning it by hand. With a wrench, set slowly 1/2 turn and then move back 1/4 turn. Continue until it is fully seated. You have to slowly unscrew it back out and then clean up the threads and reistall again with filter, spring, and gasket.

Everything seems tight. The gasket seemed a bit bigger so hope that doesn't leak. So if you need this fix, this seems to be the process. I just need to re-install the carb and test to make sure it doesn't leak. It is really tight on there. (When I ruined my threads in the carb the original fuel fitting never tightened and just kept spinning.)So far, about a five or six dollar fix. (Although after I ruined the threads on this carb I went ahead and ordered some used ebay carbs to play with...including a couple of 2bbls , but that will be another story/post. Can't wait for that).

These are the self tapping fittings. 5/16 inlet installed


This is one of the new self tapping fittings compared to the original one. The fix one is longer. Package for carb fittings in the background