a 3.9 HP volvo penta outboard of mine would run fine at high speed , but after a while at low speed it would stop. the spark plug would carbon up till it would not fire. i solved this by putting in a hotter running plug and narrowing the idle jet by putting a very small wire in it to restrict the flow. the float level was OK so that was not the problem.
Liberals are people who care about others. Freethinkers are not constrained by the myths of religion.