Solex 44PA1 Carburetor

Solex 44PA1What Can I Do About a Leaking Accelerator Pump Cover.

This can be caused from years of over tightening of the accelerator pump cover resulting in a
warped cover. Whenever we rebuild one of these carburetors we resurface
both the bowl and the accelerator pump cover. We have a nice flat
grinder that does a good job, but you could also use a good flat file.
Make sure you keep the flat file flat on the surface and file from all
angles. The high spots will be at the screw holes. You could also use a
little Permatex Anerobic gasket maker, but use very little and only
around the outside edge. You don’t want any mixing with the fuel.

Protect your carburetor from ethanol damage with our enzyme additive.

Solex 44PA1 Rebuild Instructions (pdf)
Watch a video about this carburetor.


Question

I installed the new gaskets from you on my 44pa1 solex carb. After 11
minutes of running, gasoline began to flow over the side between the
bowl cover and the carb body. It looks like the cover might be warped a
little, but it performed before. I’m guessing there is a gap. the bowl
cover you have available is the wrong kind, otherwise I’d buy a new
one. Any suggestions? Use two gaskets? Use some gasket sealer with the
gasket?

Answer

The 1st think that came to mind is perhaps the carburetor is flooding
over (too much fuel getting into the float bowl). That might look like
the gasket is leaking. I say this because I have never seen one leak
out of the float bowl gasket.

  • Shake the float to make sure there is no fuel inside. You
    can also test by heating up some water and immersing the float. Bubbles
    will form if there is a leak.
  • After rebuilding and starting up the engine, crud from the
    gas tank will rush up into the carburetor and into the needle &
    seat assembly. Remove it and flush it out with silicon spray lubricant.
    Turn the lit over and blow into the inlet hole. You shouldn’t be able
    to blow through. This is more common that you would think, especially
    with ethanol around. Ethanol acts like varnish remover inside the gas
    tank.
  • Make sure the gasket in on the seat and that you got the
    old washer out. I have made that mistake myself. This would allow gas
    to get past the seat.

With that  being said, lets discuss the idea that it is warped.
The best way to unwarp, is to sandwich the top and/or bowl between
aluminum, or steel plates in a vise and heat up the middle. Watch this
video about another type of carburetor that illustrates this method.

The last thing would be to try some Permatex Anarobic gasket maker on
both sides of the gasket. Careful not to get any inside and don’t use
too much. A little goes a long way. This is a last resort step and I
have never had to do this on a 44PA1.


Recent Posts

Choke Types

We have 4 different types of chokes, Intregal, Divorced, Electric & Electric Conversion.

Intregal Choke

Integral ChokeThe integral choke is mounted on the carburetor, either near the top, or near the bottom. The illustration shows the choke mounted on the top of the carburetor. The thermostat is heated by a heat tube that runs down to the exhaust manifold. The heat tubes heats up the thermostat and moves the choke valve to the open position. A vacuum passage in the carburetor feeds up to the choke housing and helps pull in the heat from the heat tube. Some of these chokes will also have a hot water jacket running through, or on the thermostat to facilitate heating.

Divorced Choke

Divorced ChokeThe divorced choke typs has the thermostat mounted in the intake manifold instead of on the carburetor. In this illustration, the arrow points to the thermostat which is covered by a metal shield. A rod connects the thermostat to the choke lever, which controls the choke valve to be opened, or closed. As the intake manifold heats up, the thermostat mounted, expands, opening the choke valve.

 

Electric Choke

 

Electric ChokeThis is a typical electric choke mounted on the carburetor, which is integral. In this case there is one wire on the choke thermostat. This is the 12v source, which all electric chokes use. The thermostat is grounded via the carburetor itself. Some electric chokes will have a 2nd wire (ground wire), which is connected back to the carburetor. When the key is on the thermostat is heated up, opening the choke valve.

Electric Choke Conversion

 

Electric Choke ConversionThis is a typical electric choke conversion kit. This is used to convert an integral, or a divorced choke to an electric choke. These choke kits come with a temperature sensor that bolts on to the intake manifold, which provides more accurate choke control than with an electric choke without the gauge. The electric choke conversion kit is not used for a manual choke conversion. The choke housing must be in place in order for it to work.
This choke installs in 20 minutes or less with no special
tools. Remove the old choke thermostat and replace with this choke conversion kit.
Attach the temperature sensor under an existing engine bolt.
Wire the positive wire into the vehicles electrical system. Ground the choke to the carburetor.
Complete instructions are provided for each application.

 



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