Briggs V-Twin Engine Swap Flywheel Question
I recently got a Husqvarna YT 2148 with a thrown-rod 21hp Vanguard V-twin and performed what seemed to be a successful 23hp Intek V-twin engine swap.
Being that the Intek I swapped in was not set-up to run the tractor's electric PTO (not a regulated charging system), I took the alternator and regulator from the original Vanguard and fitted it to my newly installed Intek engine. Pretty straight forward there... The only other thing I had to do to get everything to wire-up perfectly is to push the carb solenoid and ignition kill wires from the tractor's engine-side 6-position main connector, and push the wires from the Intek into their place.
Problem I'm having is the tractor's volt gauge shows less than zero when running, and goes further negative when I turn on the electric PTO. Everything operates fine, though that would seem to indicate it isn't charging properly. I admit to not really running it for very long to see if the battery is draining...
I did a little investigation with my meter, and do have battery voltage at the red wire on the regulator, verifying it is connected to the battery. Also, I checked the voltage across the two alternator wires, which read 18 VAC at high throttle. That seems low to me.
Admittedly, I need to read the battery terminals while the engine is running. I think I did, and it was something like 12.8V, but don't quote me on that. I'll have to check again this evening, but my next question may give reason not to bother...
I've been reading that there are "big magnet" and "small magnet" flywheels for the Intek twin. Is this true? If so, is it possible the original Intek flywheel (that I've mated with the Vanguard alternator/reg), being originally from a non-regulated system, is one of these "small magnet" units and is not making sufficient voltage?
'76 Sears 16/6, Husqvarna YT2148, JD LA130