The 3/32 roll pin broke off on both sides. On reassembly can I just replace the pin and slide the drive shaft back into the upper assembly? This engine was purchased 1973, used 5 years intermittenly, then the owner had a stroke and oiled up the engine and put it in storage. Several months ago he died and I now have the engine. I took the carb. apart to clean it and it was spotless. It runs like new. Can the pieces of broken roll pin cause me future problems if I leave them in there?