Re: Fuel/Oil Buildup Under 2 Stroke Cowling
In addition to the advice already given, check the oil reservoir, oil injection pump, and all of the lines. I had an injection pump go bad years ago and pressure from the reservoir would force oil past the pump, through the carbs, and out the exhaust while the boat was just sitting. Remedied by bypassing the pump and emptying the reservoir. Just ran premix fuel after that. There are other fixes, but involves replacing the oil injection pump which wasn't cheap years ago.
The right place at the right time is here and now.