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 - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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