I have a 1996 C115. Today it seemed to start OK but as soon as I gave it throttle in gear it would stay at low RPM and eventually stall. Seemed to be getting fuel from fuel line into engine. Fuel bulb was pumping fuel from end of fuel line. I am assuming some sort of vacuum problem or carb problem. After picking up and arriving back home I took it back out to test and all is fine now. I don't like problems that go away on their own because thet tend to come back on their own. Any help would be appreciated.