Hi ,
i have the problem that my 2 cylinders evinrude boatengine is only working on 1 cyl after approx 10 to 15 min on sea.
When i release the trottle then (sometimes) the second cylinder is catching up again and keep on working when i stay below a certain rpm.
I have changed the 2 spark plugs and then it works again on 2 cylinders, but again after approx 10-15 minutes the 2nd cylinder is again giving up... i think it is a combined problem, unless i use the wrong sparkplugs. I have now the Champion L85 short spark plugs. Starting the engine (manual) is no problem, even when working on 1 cylinder.
I have technical education and can do a lot myself, i only need suggestions.
I have tested the spark plugs when not fitted into the engine to check the spark and i have the impression that the little spark of one cylinder is white and i think it should be blue.
Thanks anyway for some advice.
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