We were fishing last weekend and the motor ran fine the first day, but would not start the second morning of the trip. We put the battery on charge, and everything worked ok after that. I was wondering if the alternator on a 1984 25 hp Evinrude does not charge the battery at low rpms? We were making short high speed runs across the lake, then slow trolling near the other bank for about an hour or so, then back to the dock. I thought that that much run time should have charged the battery if it was down a little, but it apparently did not, so I wondered if it only charges above a certain rpm?
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25 hp Alternator
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charging systems.
if it is electric start, it should charge the batt. most that came as electric start from factory, has a charge system. but, it you are using a trolling motor for fishing, you need to get a separate battery for the trolling motor. the charge system is only around 6 amps. and cant keep up with uotboard requirements and a troll motor.
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actually have a seperate battery for the TM, but we were running the main, as we were checking set hooks for catfish. The motor is electric start, so you say it should have a alternator. I asked my buddy to take the cover off and look to see, but it was snowing, so he was going to wait to take a look. He did check the battery, and discovered that it was low on fluid, so that may have been the issue.
I asked, because I recall reading on one of the OB forums that some of the older/smaller/particular brands of outboard motors had alternators that did not actually charge the batteries at low RPM, only at 3/4 throttle or more. I was just unsure if this applied to the 1982 25HP Evinrude we were running.
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