I am upgrading my alternator
to a Leece-Neville 8MR2401UA 100amp alternator
including a internal to external regulator
conversion kit (install steps
)and a Balmar
MC-614 external regulator
My old alternator was a Leece-Neville 8MR2198L 65Amp Alternator with builtin regulator.
While these are physically compatible alternators (drop-in replacement) the new alternator is self-excited and the old one was ignition excited. I'm not sure if and or how that impacts this.
In the interest of full disclosure I've had the engine
out of the boat
in the last week. but this morning it fired up fine (yay!) My engine
is a Westerbeke
I'm trying to perform the pre-flight tests as outlined in the manual
There are four wires you use to do the tests and this is how they are hooked up in my boat
- Blue - Field Wire - Connected to the field connection on the alternator
- Brown - Ignition Wire - Connected to a wire which is fed of of my fuel pump solenoid. I do not have an ignition switch. The key in my system enables, disables the fuel pump.
- Red - Power - Connected to the 12V output of the Alternator
- Black - Ground - Connected to the Ground of the Alternator
When testing with the engine off the voltages between the wires and Ground should read:
- Blue - 0V
- Brown - 0V
- Red - 12V
With the engine one it should read
- Blue - 12V
- Brown - 12V
- Red - 12V
In my setup the readings are correct when the engine is off.
When the engine is ON the readings are wrong, in-fact I get very low voltage on all wires.
I've never seen the lights on the regulator come on at all.
I think the problem is the ignition wire. The way I hooked it up this time was with the same brown wire the fed the old regulator.
If we can get this nailed down we can get head
Thanks for the help!