F8 charge circuit

[Malibu182]

I have a 2004 F8 (pull start) that I'm trying to set up for charging a battery. It appears to have a rectifier. When running, if I put a multimeter on the red wire and motor body (ground), I only get 2.5 - 3 volts DC. Am I missing something to get 14 volts? Photos attached of the wires and rectifier.

Thanks for the help.

[boscoe99]

Is the complete model of the motor not known?

[boscoe99]

That model has a rectifier/regulator. Needs to be connected to a battery for the full voltage to be indicated.

[Malibu182]

Thanks for the reply. I just hooked it up to battery and the voltage jumped to over 14 volts. What size wire should I run to the battery?

[99yam40]

look to see how many amps you motor cam put out at WOT.
I would not expect a small motor to put out a lot maybe 6 to 10 amps.
but your owner's manual should give that info.
16 or 14 gauge would be plenty, but you could run 12 or bigger if you have it on hand

[boscoe99]

14 gauge should do it.