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You have to find out why #4 Cyl does not have any compression.
It sounds to me that it may have stuck a valve.
If so, it is probably an intake and I bet you can not develop any vacuum in the intake to draw the air/fuel mixture thru the carburetor.
If it is a stuck valve because the guide is too tight, it may unstick itself after it cooled off.
You may be able to see something by looking at an angle down the spark plug hole.
If not, you may have to take off the side cover and see what is going on.
AN adjustable lifter screw that is not tight can un-screw and not allow the valve to close all the way may also be the cause.
My opinion,
Chris W.