When it starts acting up try closing the choke 1/2 to 3/4 and see if it improves.
This basically does two things,
First it reduces the amount of air which creates a richer mixture
Second the choke plate reduces the space for air to get into the engine which increases the air velocity and causes a harder pull on the flow of the fuel through a partially plugged passage or jet in the carb.
If doing this improves how it is running then you have confirmed you need to do further work to your fuel system.
Your observation of fuel at the bowl on the pump is only sort of testing part of the circuit.
If for example there is a chunk of crud obstructing the fuel flow past the needle and seat or your float is set too low your observation at the bowl will not tell you this.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
... [Read Article]
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