2 outings ago it took lots of cranking to get engine to turn over.  Once on the water no issues.  Yesterday drop boat in, lots of cranking and nothing....so first thought is fuel pump.  A year after we bought the boat a similar thing happened, only it was because we had run out of fuel.  Even though we were past warranty, MC kindly covered the replacement.  Yesterday, the fuel tank was half full so don't think that is cause.  What is the test to determine whether the fuel pump is shot?