2000 Merc 40hp 4-stroke- - Weak Spark?

frustratedboater

Chief Petty Officer
Joined
Jul 10, 2007
Messages
436
I am experiencing a weak spark, not the nice blue hot spark that I am usually used to in most motors. Also, mid-range throttle Boggs down, then when encouraged the throttle it will rev higher. Could this be due to the weak spark or carb issue?
 
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