360 start up problem
. The needle seats are the problem 99% of the time.
Some great info there. But the trouble is usually not ACTUALLY the needles and seats, it's DIRT in the needles and seats.
You might need to spend some time inspecting, flushing, replacing
the tank
the pickup
the fuel supply line
the rubber connector hoses
If you think flushing things out will do the job, you might do this:
"Rig" a SAFE fuel supply can, IE hung from a rafter above, siphon down directly into the carb.
Run a hose from the pump into an empty container so that the pump can freely flush fuel through the line. Allow about a gallon to pump, then restart the engine with a clean glass bottle so you can get a sample to examine for dirt, debri.
