Could a Bad Rectifier Affect the Spark Plugs?

Can a bad regulator-rectifier affect the spark plugs by causing a no-spark condition? Probably not. You might be looking at a wiring problem here instead of a bad voltage regulator issue. 

Partzilla’s powersports expert John Talley host live Q&A sessions on our YouTube channel every Friday at 3pm Eastern. In this session, John was asked if a bad regulator-rectifier could cause the spark plugs to not receive spark.

bad regulator-rectifier spark plugs

Bad Regulator-Rectifier No-Spark Q&A

Will a bad rectifier not give spark to the spark plugs?

John Talley: That’s typically not the way it works. The rectifier is just in charge of converting an AC signal into a stable DC voltage. So it shouldn’t have anything to do with not giving a spark. Although, usually you’ve got your stator wire and then you also have usually a pickup coil in there and that does tell it when to fire. So if those two harnesses are intermingled where they shouldn’t be, then yeah I can believe that. But can a rectifier cause it to not give a spark? Probably not, unless it’s just not charging and the battery voltage is too low. So could it be the problem? Probably not. I think you’ve got something else going on.

Buy powersports vehicle regulator-rectifiers

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Watch the video below to learn how to test voltage regulator-rectifiers.

Watch the video below to learn how to test and replace motorcycle spark plugs.

Watch the video below to learn about how to do wiring harness repairs.

Want to see more live repair questions answered? See more motorcycle and ATV repair questions answered here.



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