Quote:
Originally Posted by Patofnaud
"big load like a trim motor is dragging the voltage down "
Good call.
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I could be way off base too. Older outboards did not use battery power for ignition at all (some use up to 600 volts on the primary side of the coils), so the battery voltage would make no difference at all to running. Guessing that a modern 4 stroke 150 probably requires a continuous 9V+ to run the fuel injection ECU.