Super A cutting out under load

My Super A ran great at low throttle settings, but today, trying to mow with a load it cut out and would barely pull itself. Acted like it was starving for fuel. Fuel line is clean, sediment bowl is clean and fuel is fresh, and plenty to carb. Anyone have any ideas I would be most gratefull for any suggestions. Not a mechanic so may need some guidance with the suggestions. Thanks in advance to all.

A partially plugged main jet can do that.
A low float level will also.
A coil going bad can be guilty as well. Jim

Thanks, It has been running fine,but only about 1/3 throttle and without any load against it except a small trailer with brush. It happened suddenly. Thanks again for the thoughts

Pulling the bowl off and spraying carb cleaner into the jets and passages will probably clear it up with least fuss. Best of luck, Jim

the bowl, meaning the lower part of the carb?

Have you put new plugs in yet before you start tearing into the carb.

Pull off a plug wire and see if you have a hot blue fire to your plugs. If this looks ok pull
off the carburetor and soak it in carb cleaner and blow out all the jets with air pressure. Hal

Loosen the gas cap and see if that helps. Your gas tank may not be vented. Hal

One simple thing to try is to pull the choke rod out while it's struggling. See if it runs any better. May not have to do it all the way, you may find half way out is good.

If you find any improvement at all, then your problem is almost certainly blockage in the carb.

Choking the carb makes it run richer - more gas in the gas/air ratio.

So if choking it helps, it means in its normal unchoked mode, it's getting plenty of gas INTO the carb to run fine, but it's just not getting enough gas OUT of the carb into the engine.

If choking doesn't help, it doesn't prove much, but you may want to devote a little time to checking ignition components too while trying to find the source of the problem. It could still be the carb, but usually means you're not getting enough gas INTO the carb to begin with. (line blockage, floats not adjusted properly, leak in the float, etc)

I think you'll probably end up having to clean out your carb.

It's pretty easy.

I did a quick search and found this link for a carb on a super a - it's not exactly a great "how to" but it will show you what to expect if you pull your carb and take it apart.

Good luck
super a carb

yes. Jim

Thanks so much to everyone for the suggestions. Looks like I have areas to look into this weekend. Appreciate all the help. I have to echo a comment I read earlier on here, this is like sitting on a porch and asking for advice and listening to the experts.
Thanks again
Greg

what about the screen above sediment bowl in tank? larry

(quoted from post at 01:41:45 09/02/11) what about the screen above sediment bowl in tank? larry

Click to expand...

If you decide to check for a good spark like mentioned above, take off the desired plug wire FROM the Spark Plug, and hold the end of the wire to a GOOD ground on the tractor somewhere. Usually the bolt that holds on the coil. If you hold it close to a good ground, you should have a good spark. If not, check ignition components.

After reading your posts, it does sound like a gunked up carburetor. Be careful with the float becuase it is "bent" and adjusted to a certain point. When you take it apart, shake the float around and see if any gas is trapped inside. If so, its time for a new one....unless you find the hole and can solder it closed.