ns8b - one cyl runs when alone, the other doesn't.

[Lund_bC]

Hi everyone, thanks for reading

I have a 8hp nissan 2 stroke, and after having lack of power issues have found a suspect problem. If i take off the spark plug wire on on plug, the motor changes rpm but it still keep running strong, when i take off the spark plug wire from the other one it runs sloppy and then stalls. So i have spark in both and the run but one is off maybe the spark I am thinking, just learning here about outboards ..

Thinks i have tried

1. switching spark plugs
2 switching spark plug boots
3. checking compression - it's the same and within spec


I can see anywhere that there is two coils to swap to check on this unit, does this sound like a ignition coil problem to you ? and do these come as one unit or something ?

Thanks !

Pat

 

[Sea Rider]

It's a one piece CD + Ignition Coill unit. Not separate units as found in other models. If any of them fails will need to replace the whole unit.

Happy Boating

 

[Lund_bC]

agg. figures ! can't even switch the wire ? do these every come up used or cheap ?

 

[pvanv]

Run the ignition tests from the Factory service if curious. However, odds are that you need more consistent fuel/air flow from the carb, so start by cleaning that properly, and confirming cylinder head bolt torque, etc.

 

[Lund_bC]

thanks