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1990 150 Super Six Carb issues

tom_murphy

New member
"Engine starts very nice but s

"Engine starts very nice but stalls and sputters when under load. Replaced upper fuel pump with a new one and put a new diaphram in the lower. When I sqeeze the primer bulb to get it hard, gas flows out of the front of the bottom 2 carbs. Spark plugs look like new almost too new. Plugs on upper cylinders look black. HELP ME OUT HERE PLEASE!!"
 
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