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Posted

Premium fuel has more anti knock properties, NO more energy that regular; it is formulated to NOT prematurely burn (due to higher compression) than regular gas. So buying it for an engine with less than HIGH compression is a waste of money.

Posted

I think you have fuel circuit problems.If the carbs were not maintained, or fuel additives added i think you have nasty build up in the circuits.My money is to pull carbs and rebuild. A better result.Adding the choke only enriches the fuel mixture,If you are maxed out and can only run in that position, it could be a fuel flow problem. Good luck.

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