Frag,

I experienced exactly the same problem with my Moki 180 when I was breaking it in. I'm no Moki expert but here is what works for me and my Moki 180:

- prime it very well, these engines like to be very wet before they will start. I choke mine for at least 4-5 full turns and when it's wet enough you can hear a slurping sound as you flip it over. I think that sound is made as air and fuel pass through the front bearing.

- turn the glow heat up very high. I've used the Moki gold coloured plug and an OS FS plug. They are both good plugs but I prefer the Moki plug and it will start the motor first flip every time if I adjust the current to near 3 to 4 amps (not 2 amps like I use on OS#8 in all my little engines).

- with the glow heat applied, hold the prop very tightly and turn it through compression. If you feel a good positive bump you are ready to go. If no bump, you haven't got it wet enough or not enough heat on the plug.

- with the throttle set to just open, give it a solid back flip and she should fire into life.

Good luck,
Arthur