At Allan's Cay, we took a dinghy ride to neighboring Highborne Cay about a mile and a half away.   Highborne is a fairly large Cay in comparison to Allan's and I needed a walk (Allan's Cay does not provide much in the way of walkable land).  We visited the closest shore which had a nice beach and, unlike our crowded anchorage, only had one boat anchored in its shallow harbor.  After our stroll, we got back into the dinghy, and shortly after take-off, the engine died.  It appears as though the fuel line connector had cracked and more gas was spurting out the engine than into it.  We had a mile and a half passage across open water back to the boat and now the outboard wasn't getting enough fuel to operate!  With sailor's ingenuity, we found that we could use the primer pump on the gas line to hand pump enough fuel into the engine to make it go.   Hand pumping all the way, we made it slowly back to the boat.  Arriving there, we found that we had another fuel line connector and the outboard was easily fixed.  Had things not been that easy, what would we have done?  I'll tell you—we always bring water bottles with us on outings, no matter how limited the outing.  I also carry a handheld VHF, so should any emergency occur (like not being able to return to your boat by dinghy) you have a chance to contact someone for help.   So the lessons here are, 1) carry spare parts for your outboard (it is your lifeline to the world) and also, 2) carry water and, 3) a handheld VHF in your dinghy when you leave your boat!