Posted by CNKS on May 21, 2012 at 15:05:03 from (216.144.104.128):
In Reply to: M idles on main jet posted by Dalrymple on May 21, 2012 at 09:45:00:
If the PO modfified it for pulling, hard telling what you have. Take the carb off, disassemble, soak it overnight in real carb cleaner, the type that will peel your skin off, not parts cleaner. Blow it out with compressed air. Every inlet to the air must come out somewhere. You may have to clean the passages with wire as a last resort, I don't like to manually clean jets, etc, but you may have to. If the choke control is on the inside of the carb it is a SM-up carb. If it is on the outside it is an M carb. The SM carb is not adjusted like the M carb (main jet screw in until rough, out until smooth). Instead max power is with the screw 5 turns out, in a turn or so with light loads. I doubt if it will pull anything if 3 turns out. The main jet is supposed to have nothing to do with idle. Your idle system is full of crud. If you cannot get it clean, you need another carb. or at least put the right jets in it, provided you can get the old ones out.
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