Asked by: Ghania Peno
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What causes stator to burn?

Last Updated: 7th March, 2020

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A bad diode in a rectifier will dump AC current into a system. The AC current heats up the stator and the heat destroys the insulation and ultimately carbonizes it turning it into a low resistance brick.

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Regarding this, what happens when a stator fails?

The stator coil generates the power for the spark plug and other accessories on small engines Without a stator there would be no spark at all, meaning the engine won't run. While a stator is dying, it can produce a weak spark, causing the engine to miss or run poorly. Symptoms are often worsened as the engine warms up.

can a stator produce too much voltage? Adding all three together produces the total AC output of the stator. After the AC/DC conversion, the resulting voltage is ready to use in the battery. Too much or too little voltage can damage the battery, as well as other electrical components.

Similarly one may ask, what causes motorcycle stator failure?

High engine temperatures can lead to stator coil open and closed failures, especially in modern motorcycle engines that submerge the stator in an engine oil bath to help dissipate heat.

What are the signs of a bad Rectifier?

There are generally two ways for the regulator rectifier to fail. The first deals with diode burnout, resulting in battery drain. It is easy to assume that the issue is a bad battery because of symptoms such as dimming headlights, irregular meter readings and poor starts.

Related Question Answers

Charolette Kirchherr

Professional

What are the signs of a bad voltage regulator?

Symptoms of a Bad Voltage Regulator
  • Dimming or Pulsing Lights. A damaged or failed voltage regulator can rapidly diminish the alternator's ability to cycle power from the battery.
  • Dead Battery. A burned-out voltage regulator will diminish the vehicle battery's ability to charge or stop it altogether.
  • Unpredictable Engine Performance.

Harvey Errante

Explainer

How much does it cost to fix a stator?

Stator & Rotor - $250 - $1,500 for a new set
A new stator and rotor set typically costs between $250 and $1,500. They are stationary and rotating parts of any system that generates electricity. When they stop working seamlessly, they need repair or replacement.

Nevada Marzoa

Explainer

Can a stator be rebuilt?

All rebuilt stators require a core exchange and come with a one year replacement warranty. Most new and rebuilt stators are built to stock specification, but we do offer some high output stator versions as part of the Hot Shot Series so you can get even more electrical power from your machine.

Bethy Lamott

Pundit

Can a bad stator cause backfire?

The AC power windings have nothing to do with the ignition coils on a stator. Runs good at lower rpms but runs bad at higher rpms (High speed coil is going bad) Backfiring and just won't run good. Sled slowly loses power during the course of the day.

Eustaquio Grassi

Pundit

What voltage should a stator put out?

The object of this test is to see if the stator can produce proper AC voltage per 1000 RPM. For example a 32-amp stator should put out 18 volts AC (VAC) per each 1000-RPM. At 2000 it should be 36 VAC (18x2). At 3000 RPM it should be 54 VAC (18 X 3).

Hassane Gaig

Pundit

How do you troubleshoot a motorcycle electrical problem?

How to Diagnose Motorcycle Electrical Problems
  1. Battery. A great place to start is at the source of power.
  2. Main Fuse. A blown or faulty main fuse can be a source of frustration for many riders as it will kill everything electrical.
  3. Ground Wires.
  4. Stator.
  5. Regulator/Rectifier.
  6. Ignition Coil/Plug Wires & Caps.
  7. Pickup Coil.
  8. Source Coil.

Arben Adashev

Pundit

Will a motorcycle start with a bad Rectifier?

In both kinds of engines, the battery will die eventually because the lack of a rectifier will mean that the alternator is not charging the it. Eventually the engine will not start. You'll probably notice that the battery is going flat and having a hard time cranking the engine first though.

Jinchai Braunig

Pundit

What does a stator do in a motorcycle?

A stator is also the part of the alternator that's stationary (while the rotor, also called the flywheel, moves). Alternators generate power through alternating current (AC). Stored power in the vehicle battery must be DC, however, requiring regulator conversion to keep your bike powered up.

Kelsey Buenosvinos

Teacher

How do I know if my Harley coil is bad?

Usually, if your bike is at high speed, the engine will jerk and spit, making some unpleasant vibration. And when you get to 'stop sign', the engine may fail to start or it's idling. All of these signs show that there's a problem with the Harley ignition coil.

Gibril Howie

Teacher

What does a stator do?

In an electric motor, the stator provides a rotating magnetic field that drives the rotating armature; in a generator, the stator converts the rotating magnetic field to electric current. In fluid powered devices, the stator guides the flow of fluid to or from the rotating part of the system.

Latifa Wehnert

Teacher

What is a stator and rectifier?

The rectifier actually converts the current from AC to DC, while the regulator keeps the power level (voltage) from going above the 13.8 -14.5 volts needed to power a standard 12 volt battery. It is important that the stator provides more power than needed by the motorcycle so that the battery will stay charged.

Stefcho Puli

Teacher

How do you test a motorcycle ignition coil?

How to Check a Motorcycle Ignition Coil
  1. Turn off the motorcycle ignition.
  2. Disconnect the spark plug wires from the coil by hand.
  3. Measure the resistance between the coil connections for the spark plugs with an ohmmeter.
  4. Measure the resistance between the two smaller primary wire connections on the coil with an ohmmeter.

Jeanneth Laliena

Reviewer

How do you test a ignition coil?

Connect your multimeter to the positive terminal or pin of your coil, and to the high output terminal that goes to the spark plug. Most ignition coils should have a secondary resistance falling somewhere between 6,000 to 10,000 ohms;however, refer to manufacturer specifications for the correct range.

Nereo Bowler

Reviewer

Can you clean a stator?

Steel wool should be good enough but you can use a electronics spray cleaner. it will evaporate almost instantly. your gonna want to pull the flywheel and just lightly remove the rust on the steel the copper wire is wound around in the stator.

Ysaura Torrance

Beginner

How do you test a boat stator?

How to Check an Evinrude Stator
  1. Remove your negative battery cable.
  2. Remove the engine cover and locate your stator.
  3. Set your multimeter to the "Ohms" setting and turn the power on.
  4. Place the positive (red) end of your meter's probe against the blue wire connected to your stator.

Wenceslada Steshaczyna

Beginner

Why does my rectifier get hot?

It's normal for an OEM shunt-type regulator/rectifier (RR) to get quite hot — especially when the load being drawn by the electrical system is low. The RR is simply converting excess stator output wattage (that isn't needed to run the bike and charge the battery) to heat. That's why there are cooling fins on the RR.

Nichole Paula

Beginner

Can a bad rectifier kill a battery?

The diodes are part of the rectifier assembly that converts the alternator's AC output to DC. A leaky diode also can allow current to drain out of the battery through the alternator when the vehicle is not being driven. A faulty voltage regulator can also cause charging problems.

Valerijs Kirschenhofer

Beginner

How does a magneto stator work?

A magneto system like in a lawnmower, with a permanent magnet on a flywheel passing an induction coil and transformer, connected to the spark plug. A stator with several sets of windings on it, and a flywheel rotor with permanent magnets on it, connected to the spark plug through a coil.

Micah Osante

Beginner

How many volts does a magneto put out?

The voltage generated by a magneto is 50 volts. The coil increases this to 15,000 volts.