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Overcharging 1976 Evinrude 115

M

Mike Latta

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" Help,

I am at wits end.

" Help,

I am at wits end. My Motor is producing over 20 volts! I have replaced the stator, rectifier, both pos and neg cables and terminal ends, yet it still produces these high voltages at mid to upper throttle. I am thinking my 39 month old battery is sulphated and will not absorb the charge, causing the volts to accumulate and rise. Am I on the right track here?

Also will this high votage cause harm to the power pack? It apears to be on a separate circuit?

Thanks,

Mike "
 
"Mike.... That engine has a lo

"Mike.... That engine has a low ampere stator output and quite frankly, I've never heard of any charging system with a problem such as that.

However, I'd suggest that you replace that antiqudated battery with a new one, and DO NOT use a maintance free battery. OMC sent out a bulletin many years ago which stated that the maintance free batteries would cause problems with their charging systems (No, I have no idea why).

The powerpack and ignition system in general is completely self contained. There is absolutely no contact/connection of any kind between the battery and the ignition system.

Being self contained means that the engine would run without a battery.... but DO NOT attempt that as it will (in most cases) cause the charging rectifier to fail.

Joe
"
 
" Joe, Thanks for the advice.

" Joe, Thanks for the advice. This evening I hooked up the battery charger to the battery and measured the votages. Battery alone; 12.8, charger alone 12 volts, battery hooked up to charger 14+; after being hooked up for a while it registers over 18 volts. This is the same thing that has happened while in the boat. I will replace battery this week. I did have a Nautilus Marine battery that does say Maintenance Free on the case, however it has caps that are removable to add water. The Exide site calls it "Maintenance accessible".

I will let you know how the new battery acts.

Thanks,

Mike "
 
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