560 GAS WEAK SPARK POPPING AT CARB

I think you need to check your timing to make sure
that it is ok. You said you have a weak spark at the plugs, here's a procedure for checking
your ignition system,

1. Check for battery voltage at the coil. Use a test lite or volt meter.
2. Check for battery voltage at the points. Use a test lite or volt meter.
3. Remove distributor cap, rotor & points cover;
remove the coil wire from the distr cap & put within 1/4" of a good ground.
4. With points closed & ignition switch on, snap the points open a few times and watch for spark
at the coil wire end. Should be a hot spark.
5. If no spark is present: you may have dirty points, a bad condenser or a bad coil. Coil primary wire must be attached to - post on coil if battery is - grounded. If battery is + grounded then the primary coil wire must be attached to the + post on the coil. Hal
Make sure those points are set at .020" and run some 320 emery cloth through the points when closed. May have a coating on them.

Hook a timing light to No1 plug and see where your timing mark is when cranking the engine with the starter with the ignition switch on. It may have enough fire to trigger the light. Coat the timing mark with some chalk so its easily visible.

Hal