Easy check of the governor, engine off, dash lever set to idle, the throttle plate should be closed against the idle stop screw. Push the dash lever to fast, the throttle plate should be spring loaded to wide open.
Start the engine, quickly move the dash lever to fast, the throttle should go to wide open, then modulate back to near closed as the RPM comes up. If the RPM fails to respond, the throttle plate will open accordingly. All the governor is concerned with is controlling the engine speed. Surging and hunting are almost always fuel related, sometimes ignition related.
If the governor checks out, check the points gap, check the distributor shaft for side play.
Check the fuel flow through the carb at the drain plug.
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Today's Featured Article - Women and Tractors - More Views From the Farmer's Wife - by Teri Burkholder. The top ten reasons why the judges wouldn't let you participate in the stock antique tractor pull: Hey, this is stock! It came with that V8 in it! That "R" on my tires stands for "really old" not radial! Blue gas? We thought it was a pretty color! What wire hooked to my throttle?
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