Farmall 100 running weak (too weak to plow)

Hey Folks
Ran into a serious problem which is slowing up
my spring farming efforts. My Farmall 100 is
running pretty weak and when I am driving, it
always seems on the verge of cutting out.
Strangely enough, it starts every time, just
doesn"t run strong. For those of you with the
patience, below is a video of it running. The
sound is okay, so perhaps you can hear what is
going on.

http://youtu.be/yYhzuJcj1kA

I changed the condensor, distributor cap and
rotor last year (but not the points) so those are
new. I checked the fuel lines and the little
filter in the carb so the fuel line seems okay. I
thought it could be the fuel, since it sat over
the winter, but I never had that issue before so I
think it is something else. Really scratching my
head on this and taking it to the shop really
isn"t an option here in Poland, so any advice
would be appreciated.
Thanks
Ramon
Untitled URL Link
 
It sounds to me like some spark plug wires are crossed. The first thing I'd do is check that they are all in the right position. They should be 1-3-4-2 going clockwise around the cap.
 
I would remove the gas line at the carburetor and check the flow from the tank. Use a clean container to catch the gas. If that looks ok remove the tube fitting where your gas line connects. There may be a screen behind that tube fitting that may be plugged. Hal
 
Charged the condenser and cap but not the points?? The points are the part that wears the most so. I would start by checking the spark. I am guessing when you replaced the cap you did one plug wire at as time and did not mess up the firing order because if you just pulled them all off the firing order is likely to be your problem.
 
Check your air cleaner for being over full! I have had mine do that when it had gotten water in it and was over the mark. Plugs off the volume of air needed at higher throttle settings. Ran fine at idle and low speed. Just no power.
 
The spark plug wires are not crossed. I suspect an ignition problem. Points and plugs would be the first place I look, then making sure there is a solid connection with the plug wires. I would definitely make sure the plug wires had a good connection and use electrode silicone in them when I put them back.
 
I am not too up on the 100, but since you changed distributor parts, could it have something to so with the mechanical timing advance in the distributor? Is everything moving like it should in there?
 
I would try some fresh gas. Only had it happen once but snowblower ran puny like that one time with old ethanol in it. Fresh gas brought the HP back.
 
I would second, check the timing. My dad got a Cub in once that the customer could not get to have power, the timing was too slow.
 
Hi Gents
Thanks so much for the advice. I'll get up to the tractor this week and check all the items you mentioned in order of easiest to hardest.
I am still teaching myself on the electrical system (still a bit of a neophtye) and I always worry that I'll mess something up that won't be easy to fix. In the States I had a buddy who restored tractors that always helped me with the electrical system but now I am on my own. I should have paid more attention in the Battalion Motor Officer's course when I was in the Army :)
Cheers
Ramon
 

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