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15 HP Evinrude help - No power or rpms
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<blockquote data-quote="wmk0002" data-source="post: 435905" data-attributes="member: 13975"><p>Victory at last!</p><p></p><p>I lake tested the motor yesterday after work and it opened up wide open and climbed to WOT rpms. I saw 17 mph but didn't have my tach on to get rpm readings. This was with the 9.9 hp carb on it so my speed is right on par with what the 9.9 hp motor was producing on this boat.</p><p></p><p>To recap what I did... I changed the plugs, installed new OEM coils and plug wires, and put on a known good powerpack. Based on no performance changes from the new plugs, wires, and coils I would say that I had a bad powerpack all along. Based on the unburnt fuel on the lower plug, it seemed to be failing at higher speed and producing very weak to no spark on the bottom cylinder. Whatever was causing this problem eventually totally failed when the powerpack died altogether.</p><p></p><p>Now I just need to order a new/used powerpack and put the 15hp carb back on and this motor should be good to go for another 35 years lol.</p><p></p><p>I appreciate the help from everyone!</p></blockquote><p></p>
[QUOTE="wmk0002, post: 435905, member: 13975"] Victory at last! I lake tested the motor yesterday after work and it opened up wide open and climbed to WOT rpms. I saw 17 mph but didn't have my tach on to get rpm readings. This was with the 9.9 hp carb on it so my speed is right on par with what the 9.9 hp motor was producing on this boat. To recap what I did... I changed the plugs, installed new OEM coils and plug wires, and put on a known good powerpack. Based on no performance changes from the new plugs, wires, and coils I would say that I had a bad powerpack all along. Based on the unburnt fuel on the lower plug, it seemed to be failing at higher speed and producing very weak to no spark on the bottom cylinder. Whatever was causing this problem eventually totally failed when the powerpack died altogether. Now I just need to order a new/used powerpack and put the 15hp carb back on and this motor should be good to go for another 35 years lol. I appreciate the help from everyone! [/QUOTE]
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15 HP Evinrude help - No power or rpms
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