Re: merc black max help
In some instances, power packs and stators fail and then work intermittently. Identify the bad cylinders, switch packs and run it in the water. The way they operate under load is often different than at idle in the driveway. If the bad cylinders move then the pack associated with them is most likely bad. CDI makes an adapter for most voltmeters that will allow you to isolate and address the issue through testing. I bought mine for $45 or so and it includes detailed specs and instructions.
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