Be SURE the choke is closing properly.

Mixture screws out 1 1/4 turns is a good place to start

Even brand new plugs can be bad, if you have another on hand try it.
Even if the one you have sparks in air. It's a different story under
compression.

Check fuel lines for cracks or airleaks.

Check the pulse source for the diaphragm for a blockage or
disconnection. This is the connection between the carb and the crankcase
pressure that make the fuel 'pump' in the carb work. Sometimes it looks
like a fuel line, sometimes it's a orifice on the engine side of the
carb, matching a similar hole in the carb manifold. Not sure about the 021.

Make sure the diaphragm is in good shape. (pliable, no holes, not
completely stretched out)

Clean the carb again. Get a carb kit. Disassemble it COMPLETELY, clean
it with real solvent, blow out all orfices with compressed air.
Reasssemble according to a parts diagram. Lots of carbs get reassembled
wrong.


--
__
Pete Snell
Royal Military College
Kingston Ontario


The reasonable man adapts himself to the world;
the unreasonable one persists in trying to adapt the world to himself.
Therefore all progress depends on the unreasonable man.
- George Bernard Shaw