I would check the spark first. You need a FAT, BLUISH-WHITE SPARK, the color of lightning(Poor sparks need richer mixtures to ignite the fuel/air mixture). If you have a good spark. I would then check for air leaks around the carb metering section. the usual culprits are leaking thottle shaft seals, leaking carb to manifold gasket , cracked or rusted out intake manifoldor leaking block to manifold gasket. tjhis will cause a lean mixture. if you CAREFULLY spray starter fluid in these areas i mentioned with the engine running, it will speed up when you hit the leak.
If that isn"t the problem then you"ll most likely have to do abetter job cleaning the carb passages. The most import factor in a carb rebuil is to get all the passages "squeaky clean". Many times after a24 hour soak in carb cleaner you need to dig the crap and corruption out of the passges. A couple of squirts of carb cleaner won"t cut it.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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