I have an Evinrude 9.9 which I just replaced the regulator/rectifier on. Do these things actually regulate charge/voltage or is it just a bunch of diodes acting as a rectifier?
Outboard Battery Charging
- Thread starter Project_Mayhem
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I think that there is a simple regulator built into the newer motors that limits voltage. The amperage is usually kinda small and needs a bunch of RPM to get anywhere useful. the older ones might do around 6-7 amperes at 3000-4000 rpm, the newer ones can get to 10-12 amperes. Just guessing without a year and model number for the engine.
The motor is a 96. I measured ~16v with no load connected so I'm assuming there is no voltage regulator and Im guessing there's no caps of any kind to smooth things out?
Went to owners manual it only said keep battery charged, connections clean and don't reverse connections. And BTW don't touch the wires. Again bitten by another assumption met by a paradox if the manual does not say how much it charges does that automatically mean it does not have a charging source device.( Yamaha 9.9 tilt/start)
Lots of the older regulators cannot reduce their open circuit output voltage; they need a load to be able to function. Hook up the battery and measure volts and amperes .. First read the battery volts with it connected but engine not running, then read volts at the battery with the engine running at a fairly high speed in neutral; you should see something around 13 -14 volts.
They don't have "smoothing" capacitors but it may have several magnets in the flywheel to make the pulses close together (somewhat smoother).
They don't have "smoothing" capacitors but it may have several magnets in the flywheel to make the pulses close together (somewhat smoother).