RE: Problem starting 50NG
John a big problem is fuel delivery (not the carbs fault) rather the gas fuel line is LARGER in diameter than the 1/8 tubing that comes with most GAS tanks ,so it is prone to lair leaks. Dubro makes fuel barbs which you 'Silver solder' flush with the end of the metal fuel tubing, do this on your metal fuel tubes both gas and vent tube then slide the Tygon tubing in place and I bet your engine will draw fuel SECOND the starting procedure: 1)open the throttle to full open ensuring that it is when the throttle stick on your TX is fully advanced 2) apply full choke again confirm the choke is fully closed--3) smartly flip the engine over 8 or so times 4) retard the throttle to idle 5)OPEN choke 6) TURN ON ignition 7) wearing a good glove smartly,vigorously as hard as you can flip it over that should start the engine.
If all else fails turn ON ignition,open throttle fully,apply full choke flip it over 1-3 times and it should fire--then TURN OFF the choke AND close the throttle and flip it over virgorously. It should start[8D]
Lastly REMEMBER the ignition is in operative after 2 minutes if the engine has not started ( an excellent safety feature) so remember you MUST allways cycle the switch: as in turn it off and on again.
You have a quality built STRONG running engine so If no luck its off to Mike and Dan..at RCS [sm=thumbup.gif]