Posted by Fritz Maurer on February 29, 2012 at 07:11:59 from (216.137.136.168):
Had a gas 560 once that would soot foul plugs every couple months. During a tune-up I switched to UD-16s and the owner said, "They will never work". He was right, I was installing Auto-lites in about a week. The tractor has a problem, it refuses to rev cleanly when the throttle is yanked open. It will back fire through the carb unless the throttle is carefully opened, and will continue to do so until it reaches 190deg., and not one degree before. Completely dismantled the carb, soaked it in carb cleaner, re-assembled with a new kit. No change. Must have had the carb off 20 times changing the float setting, the problem moved around but didn't go away. Checked ignition timing, that was okay. Manifold vacuum 17", I thought that would indicate no mechanical defects, am I accurate on that? Finally called Denny's Carb Shop and he said, "It's plugged up". Wouldn't tell me what was "plugged up", only that it would cost 100.00 or so for him to rebuild my carb. He went on to say,"That engine will never run right unless you run my 55,000 volt coil and electronic ignition, because all spark plugs have resistors in them, mandated by the EPA, to reduce emissions". I thanked him and hung up. Now I'm confused. I have been seeing a lot of plugs lately that have "R" in the part number. But I also see a lot of C-263s with their original coils, breaker points, and a ratty set of plug wires that run just fine. The 560 I was working on, the reason it took so long to foul the plugs, is they worked it pretty hard, all wide-open throttle. It's duties were generally the lagoon pump or the grinder-mixer. It would rev up okay if it was on the verge of overheating. I'm guessing that some of the soot generated during warm-up got burned away in the course of the day. What do you guys think? thanks, Fritz
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Today's Featured Article - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
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