26 model NH carb is blowing air out of the side of the carb that the hot air pipe goes in at instead of sucking fuel to fire. what causes this???
Intake to exhaust leak? Plugged intake manifold?
thats a backfire,
if its blowing out the choke end that is.
Check and make sure all of your intake valves are closing completely.
Stephen
Does the engine start? It could be a timing problem. If the timing gears are off it would open the intake valves at the wrong time.
Norm