It's commonly called, "coughing" when a cylinder fires but the rest would not and just enough to disengage the starter. Make sure you do the following when starting cold:
1. Prime the primer bulb until it's firm
2. Ensure motor is in full vertical
3. Place throttle control in fast idle. There are two versions on how to do this. The first one is the Pull the throttle handle towards you and push forward. The second requires pushing the center button and pushing the handle forward.
4. Engage the choke system by pushing in the ignition key. On newer models it's called "Enricher" bu serves the same purpose.
5. With the choke engaged, (ignition key still in pushed down position) turn key to on and starting position.
6. Hold it on starting position for about 5~10 seconds or until the motor starts or it coughs thus disengaging the starter
6. The motor should crank over and if you're lucky should start right up. However, most of the time the motor will only cough and disengages the starter. If this happens, then turn the key back in off position and try starting again without engaging the choke.
7. Engaging the choke system more than once for every start can result in flooding the carbs making starting even harder. However, if this happens you can still try starting by keeping the throttle handle in fast idle position and keep cranking over until it starts.
