Running sluggish update

Dave/MO

Member
Could the fact that my 41 9n is running sluggish is the oil is about a quart low and need to be changed. Probably not but I thought I would put that out there. Runs fine as long as it is sitting still no matter where I have throttle. As soon as I put it in gear and try to use brush hog it bogs down and almost dies and some times it does die. Could my governor be clogged. will check screens tomorrow and check plug wires and post more update.
 
(quoted from post at 19:01:36 04/30/13) Could the fact that my 41 9n is running sluggish is the oil is about a quart low and need to be changed. Probably not but I thought I would put that out there. Runs fine as long as it is sitting still no matter where I have throttle. As soon as I put it in gear and try to use brush hog it bogs down and almost dies and some times it does die. Could my governor be clogged. will check screens tomorrow and check plug wires and post more update.

For now I would focus on your carb and having good spark. By pulling the carb drain you are checking flow to the bowl. All well and good, but what matters is having flow THROUGH the bowl.

There's lots of tiny passages in there can easily be blocked restricting fuel flow into the cylinder for combustion. A thorough cleaning would be my first option.

If you crack the throttle wide open you should be able to get it going without bogging down. All the governor does is regulate engine rpm based on load. Your tractor would technically run without one, but you would be constantly adjusting the throttle.

Low oil is not related.
 
Nothing to "clog" in the gov, but it could have worn parts or be out of adjustment.

is your linkage correct?
 
How does it act when you just try to drive it around with the PTO off?
Same way?
When you're checking the plug wires, check the firing order. 1-2-4-3 CCW.
As said, not the oil level. But I'd still fill it or change it if needed.
 

These things will run on three cylinders. Last time mine did something very similar to that I checked the spark plug wires. One was burned and stuck to the manifold.

I put a new wire on and tied them up in a bundle and it ran fine again.

You can get metal core wire by the foot at Napa. You can also get the wire ends and rubber boots there and simply make your own wires.
 
Check the spark as in blue/white and jumps a 1/4 inch gap at all 4 plug wires. Next goof flow of fuel out of the carb drain plug. Firing order correct?? Air filter not full of water and dirt??
 

Governor is way down the list of things to investigate. I would be checking fuel first. Remove drain plug and check for good flow for AT LEAST THIRTY seconds. Not just runs out of the float bowl.
 
Same thing happened to my 8N on a couple of occasions. Each time it was a carbon flake shorting out one plug. They run so good on 3 cylinders it is hard to discern, but the power disappears under load. Short out the plugs to see which one doesn't change engine speed or service all the spark plugs. This simple fix might be all you need.
 
(quoted from post at 03:01:36 05/01/13) Could the fact that my 41 9n is running sluggish is the oil is about a quart low and need to be changed. Probably not but I thought I would put that out there. Runs fine as long as it is sitting still no matter where I have throttle. As soon as I put it in gear and try to use brush hog it bogs down and almost dies and some times it does die. Could my governor be clogged. will check screens tomorrow and check plug wires and post more update.

Had similar issues with my '41. It was the carb. Cleaned and rebuilt with Gary's help and it runs great now. Including the dirt as a problem, it was sucking air around the throttle shaft.
 
Check the ignition for a good spark, check the timimg and the firing order.

If they"re OK than suspect the carb probably, especially the transition port.( I think it may be called the "economizer") It"s the one just above the idle port and provides fuel off idle. The float level could also be low.

It could also be an air leak around the carb metering section. Try pulling the choke out a little when putting it under load. If it improves than check for an air leak around the throttle shaft, at the manifold to carb interface or at the block to manifold interface. Also look for rust holes or cracks in the manifold. CAREFULLY spray some starting fluid around these locations with the engine idling. If you hit a leak spot the engine will speed up.
 

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