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Does this help?You may also have the wrong distributor or advance unit for the engine.
the pump is mechanical....i thought that thing was some type of filter ....showing my true colors here.so how do we test a mechanical pump? Do they fail often? I can hear a slight hissing sound out of the carburetor when NOT running and after trying to pump it up using the accelerator pump on the carb....Could the mechanical pump seal have failed and I hear the gas sucking back down into tank?
So, aside from that something else has come up after truck sitting for few weeks. Now, I'm not getting fuel to carb. I should be able to pull the fuel inlet from the carb and turn on key and have fuel come out right? Will the fuel pump run continuously with no back pressure from carb when key is on w/out truck running?
.....and finally, still having the high rpm issue. I made it run by pouring gas in the top of the carb. What seals the bottom of the carb and the head to that plastic plate that separates them? I'm thinking a I may be sucking air in there, but didn't have a gasket in my kit or during removal.
What is the GPM flow through that gas filter?Gnarls.
That hissing sound is interesting though. Not sure what would be causing it.
My vote is on a leak somewhere as if it was linkage it should have died when adjusting the air/fule mix screw.....which didn't phase it
I actually found the exact opposite to be true. With the linkage stuck keeping the fast idle engaged, my air/fuel mixture screw did nothing. That circuit is only relevant when the throttle is fully closed. If the throttle is open, then airflow into the engine increases -> venturi sees more airflow -> more fuel is drawn into the carb intake bbl from the primary nozzle = higher rpms/idle mixture screw adjustments are irrelevant.If the throttle is closed, airflow deceases -> venturi sees little airflow -> little fuel is drawn into carb intake from primary nozzle = lower rpms/idle mixture screw adjustments become relevant.I came to these conclusions from the following diagram + the observed behavior of the trail gear 22R carb:Before figuring out the fast idle issues, i had very similar behavior from my motor. ~2k RPM idle at operating temp, and adjustments to idle mixture screw did nothing. After the fast idle cam was unset properly/throttle was able to fully close, rpms dropped and idle/mixture screw adjustments changed idle rpms.
Now looking at the diagram above, it looks like the inlet leads to the needle valve and so I'm guessing it's stuck since I know the bowl is empty. Anybody got any tricks for this one?
The float bowl cover is only held on by a handful of screws. You should be able to lift it off and pull the whole float/needle assembly out without having to remove the carb from the truck.
throw that rock filter in the garbage and get a correct fuel filter. Those are junk.
They are so fine that they clog easily without even noticing it. They will appear clean but internally by clogged.
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