All carbs must have a device that squirts raw gasoline into the intake anytime the throttle moves Fto open. That is because the air rushes in faster then gas and it takes a moment for the carb to catch up. So the accelerator pump is used to make up the difference. It is near always operated via a soft cup or diaphragm that gets hard and stops working. First thing to go in an old carb.
GM used cups most often and Ford and Holley used diaphragms.
EASY to check. Just look down into the carb when you move the throttle to open and see if you can see raw liquid gas squirting. If not, the pump is not working.
Not sure if you have the Ford or the Holley carb. Easy fix either way.
Note that tractor carbs often do not have accelerator pumps because tractors do not get driven like cars and trucks do. That said, some IH and Deere tractors DO have carbs with accel pumps.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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