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REC and WS500 User Forum

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Alternator ratio

How do I determine my alternator ratio?

Is there a table or a math function I can use?

I have a Yanmar 4JH5E with a stock alternator.

All the fancy math cancels each other out and it just becomes a function of the diameter of each pulley or sheave.

If you have a 6 inch drive pulley and a 2 inch alternator pulley it is 6 divided by 2 equals 3