The 10si was supplemented by the 12si in the 1980s for a higher output lower cut in. The CS121, CS130 and CS144 came along in the 1990s. The 121 and 130 are smaller and are advertised higher output the the 10si but they have a digital internal regulator and the rectifier is a little more fussy when subjected to 1950s era farm tractor abuse. Tens of millions 10si alternators have been built and proven in the fields and give the most bang for the buck. Good luck with your choice. Mike
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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