Mercury Outboard, 9.9hp 2 cycle ,MLH, 1990

by Richard Crim
(Lake Oswego, OR USA)

Engine starts and idles fine. Misses, coughs, and increased smoke when accelerating or increasing and holding throttle above idle. Carb replaced, fuel pump replaced, fuel sight filter replaced, water impeller replaced, plugs replaced. Am now replacing portable gas tank and line and priming bulb to see if that is the issue. I am guessing it is still a fuel restriction issue. Need assistance or ideas.

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