Hello again, Gary!
The carb enrichment circuit for starting (choke) is designed to work with
the throttle closed. You can very slightly open the throttle but any more
than that "short circuits" the choke circuit. When using the choke fully,
you should see about 2800 rpm. As soon as it starts running rough then take
the choke off and open throttle to maintain rpm..
If the standard answers don't work then check the air gap for the trigger
modules and make sure the surfaces to which they mount are not corroded. You
could also check the float bowls for contamination. Good luck!
kp
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