Join Date: Jan 2017
Location: Lawrenceville NJ
Clean Tec carb surging, wire pin drills help?
I have an ultrasonic cleaner. Cleaning several carburetors and using them on 4 different 8hp-9hp Tecumseh engines, all with the same problem, engine surging caused by the carburetors.
To clean the carburetors, I first used the manufacturer's carb varnish buster solution and having carb surging issues I then rebuffed the carbs and again disassembled them, switched to Berryman's Carb dunk cleaner in my ultrasonic cleaner. All when assembled and installed still having carb surging issues, all with several carburetors, and the side Welch plug was removed each time, jets removed, all holes were cleaned using welding tip cleaners, then each hole was cleaned using wire pin drill bits, again with the Welch plug removed. This was done twice with two different cleaning solutions. Not one carb on one engine. I also did not replace the two needles, I just cleaned them with fine steel wool.
I'm thinking of slightly increasing the diameter of the holes that are behind the side Welch plug then trying it out. I'm not sure if I should do anything about the small side angled side hole in the brass jet.
Using that little pin drill holder seems forever to drill holes in aluminum let alone brass, so I'm thinking my Dremel might be able to hold the wire pin drill bits.
Comments other than screw it and buy a Chinese carb. I want to discover the exact cause of this problem.
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