Do I Have to Replace the Rectifier & the Stator?
If a stator goes bad and needs to be replaced, does that mean the regulator-rectifier has to be replaced as well? It’s a more common question than you might think.
John Talley does weekly live Q&A sessions every Friday at 3PM Eastern on our YouTube channel. In this session, several electrical system questions came up, especially related to stators. Here’s what John had to say about a viewer’s question on whether a regulator-rectifier needs to be replaced along with the stator.
Testing Stators and Regulator-Rectifiers
If I have to replace the stator, do I have to replace the rectifier as well? I hear you have to replace both at the same time. Is this true?
John Talley: If you want to be absolutely sure, well I don’t know. I’ve said this many times, nine times out of 10 it’s just going to be the regulator-rectifier. That’s just the way it is. The stator itself is very, very seldom the problem unless it’s just being overtaxed to where it actually breaks down and causes an open or a short in the windings. Because it’s basically just a big coil with a magnetic field being generated, which generates electricity. But they typically don’t fail unless there’s just way too much of a draw on them and they overheat, hence either breaking connection or making a connection where it shouldn’t be. And there are ways you can test that, and we’ve gone through several videos, including a standalone video for how to test a regulator-rectifier just using a volt-ohm meter. If you see an extreme where you have a really low resistance rate or it’s completely open, well then you know you need to do something about it. If your machine’s still running, you could do a static test to see. If you’re reading somewhere in between 25 and 50 volts AC, well then you know it’s ok, and it’s just going to be the regulator-rectifier. But as far as testing the rectifier, that’s easily done as well, and we have several videos that can walk you through how to do that.
Watch the video below to see how to test powersports vehicle stators.
Watch the video below to see how to test powersports vehicle regulator-rectifiers.
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