As you say 3 turns out on the main jet is too lean. Open it to 3.5 or 4 turns. Max power is 5 turns out, it can be turned in for better fuel economy. At 5 turns the tip of the needle is outside the seat. There is no "sweet spot" on the Super H/M carbs as there is with the regular H/M. The idle speed is set so that it runs smoothly. The idle mixture is turned in or out until smooth.
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Today's Featured Article - Pitfalls of Tractor Engine Rebuilds - by Chris Pratt. The first pop after you have put the machine together with your own hands is exciting and pleasing. The whole experience can be marred if one moves too fast and makes too many assumptions that they can just use "as is" some parts they should be closely scrutinizing and possibly attended to. In such cases, rework makes what could have been a fun project turn into an irritant or even a nightmare. Minor Irritants To give you an example of an minor but irritating proble
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