Quote:
Originally Posted by HarryM1BYT
Mine has a tick-over adjuster and a mixture adjuster. I have never heard of a high speed adjuster.
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Twin needle 2-stroke carbs have two mixture adjusters - one for the high end the other for the low end - plus the tick-over adjuster. This is a common arrangement.
In fact, on petrol engines for radio control models, we never use the single mixture adjuster carb as it does not allow good mixture control across the rev range.