Remember, to make the mixture leaner, turn the idle screw out, or the adjustable main jet in. I get confused about this, so I made a little note and posted it near the engine. Turning the idle screw out gives it more air, turning the adjustable main jet in restricts the gas. I had no problems with the standard main jet, but the adjustable one is nice to have. Once I was leaving the marina and the engine was not running right with a load, and sounded like it might shutdown. There was no time to adjust the timing while navigating the marina, but enriching the mixture with the adjustable jet made it run better. The trouble with the adjustable jet is you have to adjust it right.
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