1990 Mercury 90hp Outboard - Carb and Timing Adjustment - Idle Issues #mercurymarine #mercury
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YouTubeChesapeake Media
1990 Mercury 90hp Outboard - Carb and Timing Adjustment - Idle Issues #mercurymarine #mercury
In this one, I am diagnosing and treating a rough idle on my 1990 Mercury 90hp 2 stroke outboard! It was stalling at idle out on the water, but ran perfect with any amount of throttle. I first treated the fuel system with seafoam to get any carbon buildup cleaned off. After that, I moved onto the low speed mixture screws on all 3 of the carbs ...
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