Not very knowledgeable on carburators. I have a stock carburator on my 62 mercury with 352 FE. There is a rod that goes through the bottom of carb from driver side to passenger side. The driver side connects to throttle and the passenger side connects to electric choke.
The problem is I can see gas seeping out where passenger side rod meets carburator housing when I move the throttle. Is there a seal there that keeps fuel from leaking?
in a somewhat precision hole. Careful observation should show that the gas is coming from a source such as the squirter nozzles or some other place above the throttle butterflies. Please report back and someone here will be able to tell you how to cure it.
KS
I can see the gas coming out where the rod meets the housing (where it slides through) on the passenger side. I turned the throttle cable by hand and when that rod rotates you can see air/gas come out on passenger side.
What brought it to my attention is I initially saw air bubbles going up through gas filter under hood. I heard the noise of water hitting a hot surface so I pulled the air filter. You could see it seeping from that same spot and hissing/sizzling as it hit the hot intake.
I looked inside the carb (stock 2 barrel) and when pulling back on throttle you can see both sides squirt gas into the bowls. There is a ring protuding over each bowl. The gas squirts below it into the bottom.
I also moved the shaft up and down (vertically) from driver side and there is some play. Each time I do it you can see gas and air seeping through the spot I mentioned on passenger side.
it only does this after the motor is warm? Sounds like the fuel is boiling out of the bowl, coming out of the booster(ring in the center), hitting the throttle shafts and then running out the sides.
LarryK
1964 Galaxie 2dr 390/6-71/4spd
1964 Country Sedan Wagon 428/5spd
1969 F100 428/4spd
1967 F100 352/now a 4 spd!
1959 B Model Mack
I don't know about Autolites but, they probably are also. A good carb shop could probably rebush it for you. The leak is from play from 40 years of wear on the shaft and housing.
Ron.
and you work the throttle. However, it is an air leak when the engine is running, not good either. As mentioned, the cure is to buy another carb or have bushings put in yours that will bring the hole to it's original size. If the carb base is aluminum, the bushings will last longer, as they're usually made of brass or bronze. Some companies sell the bushings, a drill and reamer for Holleys and some other makes, not sure of Autolites. They have to be installed at a machine shop.
Good luck,
