Finally got around to messing with my carb due to a gas leak. Didnt seem to bad. Believe its an autolite 1100. Watched a quick online video and used the $30 kit I picked up online. Gasket actually looked pretty good, so may been done not to long ago. I cleaned it up and changed gaskets, replaced a couple things. Wasnt as bad as id thought it may be.

So heres my deal as right now:



1:What is this rod and does it and the arm its attatched to actually do anything?

2: You can see where it was leaking down.

- Un marked arrows are where I suspect the leaks to have been. Alot of the moist is oil from taking off the oil bath air cleaner.

I finished it up and reinstalled but stripped where the fuel line goes in to the carb. I think the strip is inside the thread in the carb. Can I use a tap to rethread? Will I have to go slightly bigger and get a bigger connector on the fuel line? I assume Id have to be awful careful about any metal shavings not getting in the carb. Any suggestions.

Everything else seemed to go well, fired right up, no leaks except where I stripped it.

Pic of connector I stripped:




Other pics:

 

What does this do? Just blow out extra fuel when it coming down after being loaded?

 

Well I read a couple options. One was a self threading adapter, the other some expensive thing I'm not doing, and last one what I tried: marine jb weld an adapter then cut hard fuel line and connect with rubber hose. I've heard it's not permanent but we'll see if it works.

 

The fuel inlet should have had another fitting in between the carb and your fuel line. It should have been 1/8" pipe to an inverted fitting. The first picture is a vent opening rod and lever that was later plugged. From the amount of fuel on top I would suspect your carb was flooding, check the float for fuel in it. The fuel pump maybe bad and leaking pay the diaphragm.

 

Thank you sir. This helps. Appreciate taking time to reply.

 

off the top of y'alls heads do you know how much CFM those autolites put out? I want to switch my 300 to a 4v 390cfm holley but I want to know what I am coming from. I expect the mileage gains to come from smaller primaries though.

 

http://www.classicinlines.com/AutoliteCarbs.asp#14

Check this out look at the 1V section.

 

good link, thanks bro

 

Well, after i finished the carb and stripped the fuel inlet i went ahead and fired it up to see how she did. Ran fine. Now ive got the inlet "repaired" with no leaks and she will only fire up and run for a bit (sometimes a good bit) then stall.

Ill follow previous advice here and check the float and check out the carb again, then get a look at the pump as well.

Ill try to post some pics as i go if it helps anyone with same issues at any point.

 

Well, this has been interesting....
- so I "rebuild" the carb, install it and strip the fuel intake threads, start it and it runs fine anyway, then I fix the threads problem and it stops running fine.

Pic of fix:





So then I spend untold amounts of time messing with the carb, filling the carb bowl and making it run that way, watching it starve for fuel and seeing the carb bowl is empty....then finally figure out....somewhere along the way I ran out of gas. Yes, thats what I said....no fuel in the tank. Ugh....
This whole time I had set it up to try and get more fuel in. Guess what happens now, it floods (after putting fuel in the tank).

So I reset the float bowl (it does float and never seen fuel in it) and try again.
After multiple tries I realize that:
- That think on the top of the carb with the arm going in to it is where fuel will shoot out when the carb is flooded.
- If I give the float in the carb bowl any play to the needle it will eventually flood at idle.
- If i give the float/needle no play (basically the float is holding the needle closed regardless of fluid level) it will eventually starve.
- I cant seem to find the middle where it will idle without eventually flooding.

Also my fuel pump is still spitting fuel through that hole in the top, sometimes so far it gets up to the battery.

I bought a new fuel pump but havent installed that yet.....

Any ideas?

Float pressing needle in whole time looks like this after removing top, starved:




Float with any amount of play at idle will eventually do this, when removing top after stall, flooded:



Meanwhile this thing is shooting fuel everywhere anytime it is close to running right:





Thanks....

 

by the way, the fuel pump shooting fuel is actually coming out of a hole in the top of it....almost like a relief hole....

 

If the fuel is coming out the overflow tube that goes into the bore of the carb its flooding. The needle is failing to seat because of misadjustment, damaged needle, or to much pressure coming from the pump. Another issue is placement of the steel ***** in the carb.

 

New fuel pump in, no leaks. Of course it doesn't have that hole the original did to shoot fuel out of either. No smell of gas in the oil. It did have an oily grime inside the fuel pump hole that had metal flakes in it. Yay.

Still floods, if I'm on the throttle enough to stop it it's fine. I've played with about everything. Guess I'll keep trying adjust the float and point.

If this pump doesn't have that hole that seems to release pressure, one the float and point close the line off, where does the mechanically pumped fuel pressure end up, as backed up pressure, beats me. This why always avoided carb work.
Doesn't seem like that float and point could stop all the pressure.
Maybe to much pressure in fuel line in first place? Think pump said 5psi?

Still open to any ideas.

 

Just saw this. Thanks for your help.
***** are same, needle is new, not the type you can change the seat.
I'll check pressure next, but I suspect something about the needle as well.

 

https://m.youtube.com/watch?v=8bgc21iYKyY

This is for needle and seat installation and adjustment. The whole series is great.