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<blockquote data-quote="Colt45" data-source="post: 110966" data-attributes="member: 1693"><p>3) New spark plugs. That initially was what I thought was a problem, because the<em><strong> bottom cylinder was wet and the plug seemed pretty corroded.</strong></em> Replacing the plugs seemed to help, but apparently didn't fix the main issue/s.</p><p></p><p>I had this issue on my 9.9 kicker for years, bottom plug was getting wet, top one ran dry. I kept a mental run time in my head and every 8 hours of run time I would pull the bottom plug, either clean/dry it or change it out. If I didn't do that, it would eventually get so wet that the motor wouldn't even start, which sucks when you are on the water wanting to pull cranks.</p><p>I change the needle valve in the carb, talked to lots of weekend mechanics, and was never able to eliminate it. Finally, last fall I could not get it started at all so took it in. Mechanic said it was the ECM module that was bad, it wasn't firing properly and the bottom spark wasn't firing hot enough and that's why my bottom plug was getting wet. </p><p>After changing out the ECM module, it starts like a champ. I really haven't used it much yet for cranking or put a whole lot of hours on it, usually do more cranking in the fall so I am not certain at this point if my problem is finally solved or not. My kicker is a 9.9 Mariner.</p><p>Just thought I would let you know about the ECM may be faulty causing a goofy firing sequence or its not firing hot enough.</p><p>I am not a mechanic either so hope this makes sense, just trying to help you out.</p></blockquote><p></p>
[QUOTE="Colt45, post: 110966, member: 1693"] 3) New spark plugs. That initially was what I thought was a problem, because the[I][B] bottom cylinder was wet and the plug seemed pretty corroded.[/B][/I] Replacing the plugs seemed to help, but apparently didn't fix the main issue/s. I had this issue on my 9.9 kicker for years, bottom plug was getting wet, top one ran dry. I kept a mental run time in my head and every 8 hours of run time I would pull the bottom plug, either clean/dry it or change it out. If I didn't do that, it would eventually get so wet that the motor wouldn't even start, which sucks when you are on the water wanting to pull cranks. I change the needle valve in the carb, talked to lots of weekend mechanics, and was never able to eliminate it. Finally, last fall I could not get it started at all so took it in. Mechanic said it was the ECM module that was bad, it wasn't firing properly and the bottom spark wasn't firing hot enough and that's why my bottom plug was getting wet. After changing out the ECM module, it starts like a champ. I really haven't used it much yet for cranking or put a whole lot of hours on it, usually do more cranking in the fall so I am not certain at this point if my problem is finally solved or not. My kicker is a 9.9 Mariner. Just thought I would let you know about the ECM may be faulty causing a goofy firing sequence or its not firing hot enough. I am not a mechanic either so hope this makes sense, just trying to help you out. [/QUOTE]
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