Carburetor Diaphragm.
Hello to all. The carb diaphragm I had drying or curing is doing fine and is in the carb at present. Right now I'm waiting on the arrival of a fuel pump valve ass'y for my 4-30. I've rebuilt the primer and checked the fuel pump diaphragm, it's OK, but the valve is shot, but have one on its way along with some other missing parts I needed. If the parts show up this week I'll have her possibly running this weekend. Does anyone know the initial carb adjustments for these old Mac carbs? I initially set the High speed needle to 2 turns and the Idlle to 2 turns to start with. I see that when the primer is operated it puts gas directly down the impulse tube to the crankcase. I always thought that the primer put fuel through the fuel pump and into the carb. This is a learning experiance for me. Have never worked on one of these old saws and haven't seen one since I was a kid. Should be interesting to hear her start and run. OK. talk later. Lewis.
