carrier carb question

[rob love]

No. Whatever is in the carb will often disappear on these older engines with the after boil. With bad fuel pump checkvalves, everything in the lines and pumps goes downhill back to the tank, or some of the fuel in the lines will also afterboil.

If there is a slightly leaking checkvalve (just one) the pumping performance will go to crap. Cranking speed just won't do it. Running speed will/may.

I picked up a dozen M38A1 pump kits a lot of years ago, and cannot count the different pumps that I have used those valves in. Just in the last 6 months I fixed a Jeep pump (uses 6 of the checkvalves), a pump in the museums white scout car (uses only two of the checkvlaves), and a carrier engine.

[Jordan Baker]

Good to know. Thanks.

[rob love]

A fuel pressure gauge is the proper way to test, and the pressure on a Ford is not particularly high as I recall. But if your lines are original, it is a bit of a pain in the ass trying to match up those goofy compression fittings to a pressure gauge.

Part of the problem with the afterboil, I believe, is todays fuel. More modern (and here I am talking pre-fuel injection days) utilized a return line from the fuel filter or pump to help keep the pump and lines cooler. Not so back then, and having the pump above the engine like a Ford did, or even worse, next to the exhaust manifold like a Dodge flathead, in no way helps keep the fuel system cool.

An electric pump further back and lower in the system helps a lot too, but isn't original.

[RichardT10829]

Float chamber has crap in it ? Or lift pump would be my guess.

[Lynn Eades]

Jim, What type of carb are you running?