I have a Catalina 309 with 1008 hours on an engine that has been well maintained. Repeated bleeding of the injectors has not allowed starting the engine. A mechanic has indicated that it is a simple problem (which he will not disclose). Does anyone else have knowledge of a simple explanation or fix for this problem? Fuel is clean, filters are good, lines have fuel to the injection pump, motor turns over at a good speed when trying to start.