I have a 1999 Crownline 180BR with the Merc 4.3L Alpha One (Carb w/electric fuel pump). There is a total of 77 hours, so it's not old yet. It would only run for 5-10 seconds and sometimes would not start. At the time I had no tester, but I did not feel or hear the fuel pump prime before starting. I also removed the line going into the carb. and started the engine and no fuel was pumped. I thought it was the fuel pump, but I removed it and tested it and it does come on/off. I am bringing it back to the boat and will check the power to the pump - unless anyone has a suggestion. The drawing I have shows Pur/yel wires to the pump plus ground-blk. The ground is good, I was able to check continuity. The pur/yel wire is also common to the starter motor sol, the Oil pressure switch and the elecrtic choke?(not sure I saw that) I am not sure about the exact process that happens? 1.Electric choke to prime 2.Off starter during start and pressure build 3.Through the pressure switch while running????? At some point I would expect some fuel to pump out. I removed the filter and put a new one on. no water - all fuel, no change.<br />Thank you in advance for any information.
