Re: sick evinrude
Fuel primer bulbs are normally installed so that they lay flat (horizontal) when running. The normal function is that the fuel level will drop to the halfway point which is normal. It will stay full and hard only if installed in a vertical position with the outlet facing up.
If squeezing the fuel pump, acting as a manual fuel pump, cures the problem, then the trouble is with the fuel pump (whichever type you have).
Spark..... With the s/plugs removed, the spark at cranking speed should jump a 7/16" gap with a strong blue lightning like flame.... a real SNAP! Does it?