Surging

My 8N Ford front mount is surging it runs with the choke out but has no power how do I repair this problem. Thanks cellerdoor

Clean the carb!

If it needs the choke out to run it"s not getting enough fuel. Clean the carb first, check fuel line/tank for obstructions.

It's too lean.

First, check for vacuum leaks. Look for loose carb flange bolts, intake gasket leaks, anything that can cause a vacuum leak.

Then try opening the main jet adjustment, about a 1/4 turn at a time, see if that helps.

Next thing to check is fuel delivery to the carb. There is a drain plug in the bottom of the carb. With the fuel valve open, remove the plug, be ready to catch the flow in a clean glass. The flow should start as a full stream, as the bowl empties the flow will slow to a trickle, but should not slow to a drip. If the test fails, check the screen in the sediment bowl, there may be another screen in the carb where the fuel line connects. Try opening the fuel valve with the line disconnected from the carb, should get full flow. If not the problem is in the valve, or tank is contaminated with rust. Also look at what was collected in the glass. If it's contaminated with rust, dirt or water, those problems need to be addressed before servicing the carb.

If there is contamination in the tank, it will also be in the carb. Don't be afraid of the carb, they are simple and field servicable. A quick fix is to remove the bowl and clean everything up. Some spray carb cleaner and compressed air work well. Check the float level, check the jets for blockage, check the needle/seat for blockage. If the carb is in bad shape, a "comprehensive kit" will usually bring one back into service.

The "N" forum on this site will help you out. (Not that no one here will )

Trouble it.
#1 check the spark It needs to be a blue/white in color and jump a 1/4 inch gap at all 4 plugs.
#2 check for a good flow of gas out of the carb drain plug. It should fill a pint jar in 3 or so minutes.
Also check and make sure the gov to carb linkage is not binding.
You also might try adjusting the main jet. The one pointing down on the lower part of the carb. See if you can open it up some and stop that problem. If you can open it up to the point you can pull it out and still run you need to rebuild the carb.
Also have you done any thing to it that your not telling us since that maybe where the problem is

Thanks to all who replyed, it was a carb adjustment simple.