bluesideup
Member
Hello all,
I have a 9.9 Evinrude model E10RELETM that runs rough and develops little or no power at high RPM (high throttle setting). It seems to idle fine and run smooth at lower power settings. It also seems to run best when we first take the boat out. It won't miss or bog down at all for the first few minutes (although, I don't think it develops the power it should), but then does not run well for the rest of the day.The motor is new to me and has had this problem since I got it, so I don't know what the normal idle and power capacity is supposed to be. I asked about it in another thread I posted about another topic and was given some good advise on checking the carb. Before I got to the carb, I wanted to test the spark.
I removed the bottom plug wire and started the engine (using muffs at home) and it ran as it always does out of the water. I tried the same with the top plug removed, using only the bottom cylinder. It would not start. I assumed that the engine was running on only one cylinder. I plugged both back in and started it again. While running, I removed the bottom plug and it ran rougher, but not as bad as when the top plug is removed. The bottom plug seems to be weak, but is providing some spark (maybe both are weak, but the bottom is just worse?). It also seems to smoke a lot when first started. Could this be the power pack or coils or both? Is there anyway to determine the problem without diagnostic tools that I do not posses?
Here is a video of the engine running in the water when warmed up:
http://www.youtube.com/watch?v=_9XyqKDM79c&feature=youtu.be
Any info or advise is appreciated.
Thanks,
Bill
I have a 9.9 Evinrude model E10RELETM that runs rough and develops little or no power at high RPM (high throttle setting). It seems to idle fine and run smooth at lower power settings. It also seems to run best when we first take the boat out. It won't miss or bog down at all for the first few minutes (although, I don't think it develops the power it should), but then does not run well for the rest of the day.The motor is new to me and has had this problem since I got it, so I don't know what the normal idle and power capacity is supposed to be. I asked about it in another thread I posted about another topic and was given some good advise on checking the carb. Before I got to the carb, I wanted to test the spark.
I removed the bottom plug wire and started the engine (using muffs at home) and it ran as it always does out of the water. I tried the same with the top plug removed, using only the bottom cylinder. It would not start. I assumed that the engine was running on only one cylinder. I plugged both back in and started it again. While running, I removed the bottom plug and it ran rougher, but not as bad as when the top plug is removed. The bottom plug seems to be weak, but is providing some spark (maybe both are weak, but the bottom is just worse?). It also seems to smoke a lot when first started. Could this be the power pack or coils or both? Is there anyway to determine the problem without diagnostic tools that I do not posses?
Here is a video of the engine running in the water when warmed up:
http://www.youtube.com/watch?v=_9XyqKDM79c&feature=youtu.be
Any info or advise is appreciated.
Thanks,
Bill