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 - Women and Tractors - More Views From the Farmer's Wife - by Teri Burkholder. The top ten reasons why the judges wouldn't let you participate in the stock antique tractor pull: Hey, this is stock! It came with that V8 in it! That "R" on my tires stands for "really old" not radial! Blue gas? We thought it was a pretty color! What wire hooked to my throttle?
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