Posted by josh in pa on June 14, 2017 at 04:42:24 from (174.200.11.97):
I have an Oliver 550 gas that I use infrequently. I am using it some this week to spray standing corn, it's my only tractor that is on 60" centers. Starts and idles fairly well, and runs ok. It pulls ok, and pulls down smoothly under load. Once it pulls down far enough, it starts missing badly, and power really drops off. It does the same if it's idling and you fully open the throttle quickly. I had the carb off, good flow of fuel, all passages seem clear. I filed the points and checked gap. While doing this I opened and closed them several times and wasn't getting reliable spark. The resistance of the cool was kind of bouncing around, and was 0 sometimes, so I assumed it had a short and replaced. Maybe a little better, but it still cuts out under full load. When it cuts out it sounds like one cylinder drops out, the engine sound is uniform, just not smooth. What do I need to check next? Plug wires all look good, and I misted some water on them with no effect. It does the same thing hot or cold, and whether it's been running an hour or as soon as you start it. Thanks, Josh
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