I am not sure where you even got this part number.
How could you even come up with any part number without knowing what flywheel and/or alt that he had?
You want him to buy some regulator that you threw up a part number for?
The same engines have differing charging systems, depending on their application. Charging output is dependant on magnet size,
as well as alt size and structure. The end amp/voltages are a product of all of the variables, which is why I ask questions, because I have a big phobia of dispensing bad advice, which clearly doesn't bother some of the guys here!!!!
I hate to tell someone to spend $50 and have it not fix his problem.