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Question about charging systems

Old 01-04-2019, 05:15 AM
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Default Question about charging systems

So a friend of mine has a 8 year old E-TEC 115hp, and his batteries were dead, he called his mechanic and the charging system is shot. Only to find out that the charging system is built into the ECM and the whole thing has to be replaced at a cost of $1700 just for the parts, then the new ECM has to be programed to the motor at additional cost and you can't do it yourself !!!. I thought DAM my rectifier went bad on my OXX and I did it myself for like 50 bucks or something like that !! ARE all the new motors like this? newer Yamahas, Mercury's and ZUKES ? because I think that's messed up you got to change the whole ECM not just the rectifier.
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Old 01-04-2019, 05:34 AM
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Etecs are the only model of outboard motor that embed the rectifier/regulator within the EMM.

Being a two stroke, it helps to keep things simpler. One less part is needed. Four strokes are overly complex using two or more separate charging system components.

Except for the four stroke models that use an automotive style belt driven generator.
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Old 01-04-2019, 06:43 AM
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Ask your friend to talk with his tech to see the engine report that was downloaded as there may be EMM overheats that contributed to the problem or intermittent electrical connections. Wing nuts fastening the battery cables often loosen or corroded terminals or reversed polarity connections often are the culprit. The motor should have been rigged with lockwashers and hex nuts on the battery terminals as the installation manual calls for.

Reflashing the EMM by a competent tech may bring the EMM back to life if it was due to corrupted firmware. It's worth a try. He may also ask the tech to contact Evinrude dealer support to see it they might help out in some way, even though the motor is long out of warranty.
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Old 01-04-2019, 06:50 AM
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My mercs had 40 amp alternators and a serpentine belt. Awesome.

That etec sounds like a nightmare.
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Old 01-04-2019, 09:22 AM
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its a shame, engine runs perfect, according to him and never had a problem until now, it doesn't have a ton of hours on it. The mechanic even told him he could use it,just keep an eye on the volt gauge and switch to the other battery when the one gets to 11 volts and head home then charge them back up
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