You couldn't have checked for spark in 4 minutes.
There is no reset for low oil pressure. Once you have filled it with oil, and the pressure is up, the low oil pressure switch would not set it off.
But the start switch bypasses the LOPS while cranking, so if you are not even gettign spark while cranking, oil pressure is not the problem.
If you are not getting any spark, here is what you need to do.
Disconnect the red and black ignition module wires from theterminals of the coil.
Run a 12V jumper to the red wire of the ignition module. Setyour meter to VDC and connect the black meter lead to a good ground.
Connect the red meter lead to the black wire coming from theignition module.
Using a 3/8" Allen wrench in the rotor through boltlocated in the center of the right hand side of the set, slowly turn the enginecounter clockwise as viewed from the right end. The meter should read 12V for1/2 revolution and drop to about 1V for the other half revolution. Turn themotor through at least 3 full revolutions.