Ok. I have a 2002 Outback LS carb engine. Last week boat started to die out on water. Kept acting like I was out of gas. Finally got it on the trailer, aand brought it home. Changed the fuel filter and just triued to take it back out. Cranks but no fire. Oil pressure is showing on the gauge when I crank. I am thinking bad fuel pump, but not sure how to test it.