|
Bobby, we might need a little more basic information & history on that tractor or we'll have you doing everything & chasing things that don't need chasing. ~That back firing usually says you have a lean problem & the black smoke tells us you are running rich so there is a slight conflict there. ~I guess the place to start is to install NEW spark plugs & see if that helps.. [the number one reason a 2-cylinder acts up under a load is fouled spark plugs]. ~Then re-set the carb load screw to 1 turn out from seated [that�s the carb screw closest to the tractor�s center].. Test drive to see if that helps. If not open it � turn more & drive it. ~Next try running with the choke partially to almost fully back on [closed] & drive it.. If that helps you probably still have a carb problem. [if running with the choke back on helps, post back or E-Mail for carb cleaning instructions, or send it back to the original re-builder] .. ~You could also have something simple like a cracked distributor or magneto cap [or moisture in the cap].. It probably wouldn�t hurt to pull that & take a look inside for cracking & carbon tracks. ~If new plugs & load screw adjustment doesn't make a difference then there are a few basics that need to be done to try to point to the problem system.. 1st)- Take an old [known good] spark plug & open the plug gap to 3/16� [use a 3/16 drill bit as a gap gage].. Then install that in one side plug wire at a time & lay on the engine block,, then crank the engine.. You need to see a bluish colored spark jump that 3/16 gap.. If you get a bluish spark to jump that 3/16 gap repeatedly your ignition system is probably not the problem area. ~2nd)- Open the carb drain on the bottom of the carb & make sure you have a pencil sized stream of fuel flowing for AT LEAST 30 seconds, if not suspect a plugged fuel strainer at the carb�s fuel inlet area,, or a plugged main strainer, or a plugged exit fitting at the fuel tank, or some other fuel system restriction. ~If none of the above highlight the problem area then you might still have an internal carb problem, or weak valve spring, or any number of other problems.. With a little more tractor & problem history we can probably save you a lot of trouble shooting & testing.. ~Try the new plugs first, then do some of the above tests, then post back or E-Mail with tractor & problem history & we�ll get your problem solved.. [email protected]
| 
