How about a porous or cracked casting in the carb body? Once it heats up, the crack opens and the vacuum leak or fuel dump begins. Do you have another carb to throw on there in a one-minute-pit stop swap, the next time it dies? And also running it off a gas can and an electric fuel pump, and not the fuel tank itself.
Sounds kind of like the old Qaudrajet problem with the leaky lead plugs in the bottom - when the carb heats up, the leak begins and it floods the engine out and no-restarting for a while.
Last edited by njsteve; 03-10-2020 at 08:58 PM.
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03-10-2020, 08:54 PM
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