The electric pumps are pretty reliable. MSRP around $400. I changed one in all my years working on these. There are fewer than 10 units in stock at Tohatsu America.
Flooding has nothing to do with no spark. The check valve is to keep the accelerator pump full, so if it leaked, the worst would be no fuel from the accelerator pump. Re check your needle valve and float.
Of course everything is in the Factory service manual, available from any dealer. An analog ohm meter will be your friend. How do you know it does not have spark?
The 9.8A2 and A3 (you did not mention model -- year is irrelevant) use a siamese coil, so likely not ignition. What method did you use to clean the carb, and what were the symptoms that led you there?
