Alternator

[Brucep 0]

With a dual circuit alternator and the flywheel off and the alternator disconected from the equipment harness should there be continuity threw the AC output wire to the engine block? Bruce

[firefoxz1 4]

Yes, I believe so.

[2burning 1]

If it's a Kohler with the unregulated charging DC and the AC for lights, the AC should show 0.4 ohms to ground. If it is 0 ohms, the stator is shorted, if it is infinity then there is an open in the stator or lead wire. No lights?

[Brucep 0]

Thanks guys. It is a Briggs and a new alternator. Sounds like it's right but for some reason I'm not getting the output from it like I should and I'm having a heck of a time figuring out why. Thanks again.

[2burning 1]

I am not up to speed with cast iron B&Ss, but on a Kohler you really have to rev it up to get decent light output. You can measure open circuit (lights off) voltage at ~3000rpm, supposed to be 15V _AC_ scale on a K, I would guess something similar on a B&S?

[Brucep 0]

Yes, the Briggs does light better with higher RPM's. You measure the Briggs Dual circuit alternator at 3600 and should have 14 AC volts and 2 to 4 DC amps. I get about 5 to 6 volts and 0 amps. Brand new alternator and electrical parts aren't returnable.

[2burning 1]

Sounds like you they gave you a bad one, or maybe the magnets are bad? Do you have another flywheel or alternator to try?

[Brucep 0]

I still have the old one, (alternator) I messed with it for a long time and finaly found out there was supposed to be a Diode in the one wire that somone had cut out. Very hard to figure this stuff out because the manuals aren't all that clear, even Briggs people dont give ya a straight answer and the local supplier's seem to not know either. I dont know how to tell if the magnets are bad. I know they all are still magnetic, that's about it. I have searched the site for somone with the same model engine and dont see anyone with it.

[BLT 716]

PM me your E-mail address and I'll send a a bulletin I downloaded from Briggs. This might help you.