I am working on an Onan b48m. It was running great but when I went to start it this weekend it wouldn't run good. It would idle badly and really didn't want to rev. I have completely replaced the fuel system, and removed the carb, cleaned it, new carb kit, plugs checked intake and checked spark. I am getting spark put its not the brilliant pop it should be. My tester only goes down to 200 ohm but it tested the coil at 5.9 to 9 ohms and wouldn't stay consistent. Would a bad coil cause a engine to run rough, and act like something is terrible wrong.? How do I check condenser, I am not sure what setting to put my tester on?