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I’ve lived with this since I bought the boat because it was low on the priority list and engines always started .port engine always starts fine and I usually start it first and turns over nicely. Stbd engine sometimes will not turn over as if the batteries are weak and relays start chattering.after that happens I checked batteries and have 12 .6 volts.ok so I know the answer is to clean every terminal in the 12 volt system which I have been working on.sometimes to start I hit crossover switch to get it going.since I’ve been cleaning the terminals it seems to always start but I’m not convinced I’ve licked the problem.today I checked voltage at batteries and then at starter.had 12 .9 at battery bank after shutting off charger for 5 minutes and 12 .6 at starter. Is this normal or should I be seeing 12 .9 at the starter in this situation.bill
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