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mike fitch
09-02-2003 16:08:40
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After having the tractor outside but under cover for 2 years, unrun, it started up and ran relatively well, tho on 3 cylinders. It had a stuck intake valve--oil has been changed, and filter. I freed the valve and it ran pretty well, tho with some cutting out, displaying symptoms of fuel contamination, water or sediment. Replaced sed bowl, cleaned filter screen, flushed some particles out of tank, until tank was completely clean. Ran fairly well until it got warm and running on rough ground, it would cut out from steady state rpm, still displaying fuel contam symptoms. Had a shop rebuild carb, replaced coil, and it will start and run fine for 5 to 15 minutes at various rpms, under no load. Periodically it just chokes down and catches itself, regains rpms, runs a while longer, cuts out again, sometimes cutting out to the extent of quitting. It doesn't seem to be in the fuel. I will replace the plugs and wires, and would appreciate any other comments as to what is causing this erratic behavior. When it runs well it purrs like a kitten, but then suddenly up and quits, and then runs well again. Finally it will after 15 to 20 minutes just quit, and then later, an hour later, after cooling down, it will start again and go thru the same cycle. Some backfiring occurs during these episodes, but not always. The sporadic nature is what has me puzzled. Thanks for any help.
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