Posted by Z-man on March 19, 2014 at 18:18:26 from (67.235.12.112):
In Reply to: tuning the carburator posted by ben harpo on March 19, 2014 at 17:49:29:
well to get start I always begin with an idle. make sure the engine is slowed down to 400 rpm or lower to adjust the idle screw. keep in mind on the to30 carb running the idle screw in makes the mixture more rich were as on other carbs turning the screw in make the mixture more lean. as for the main jet it will pick up from the idle screw as soon as you give it throttle so at that point the idle screw will make no change if the engine is running to high rpm. back to main, from what I understand 1 1/4 turn is the most you what to turn the screw out, I believe mine is set somewhere between 7/8 and 1 1/4, but each tractor likes a little different setting. also it my help to use higher octane fuel as it is closer to what was available when the tractor was made
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