how do you properly test a stator

[blue fin]

Can anyone please tell me how to properly test a stator?

 

[R.Johnson]

Re: how do you properly test a stator

You take a continuity reading, or ohm's test. You need the spec.'s for the stator you are testing. You also make a short to ground test.

 

[blue fin]

Re: how do you properly test a stator

You take a continuity reading, or ohm's test. You need the spec.'s for the stator you are testing. You also make a short to ground test.

Please excuse my ignorance could you explain short to ground.

 

[R.Johnson]

Re: how do you properly test a stator

Again using your ohm meter, hook one lead to the stator ring, or engine block if the stator is still on the engine. Hook the other lead to each one of the stator lead's, one at a time, the meter should read no continuity, or register infinity. Most stator's will have a very low ohm reading, like 1-3 ohm's.

 

[Barnacle_Bill]

Re: how do you properly test a stator

What motor is it on?

 

[blue fin]

Re: how do you properly test a stator

What motor is it on?

the motor is a 1977 85hp evinrude

 

[blue fin]

Re: how do you properly test a stator

Also is there any way to bypass the stator, just to check and see if i get spark then. I have no spark on all four cyllinders. I have power going to stator but nothing returning to power pac. thanks in advance!!!

 

[KYHunter2]

Re: how do you properly test a stator

You won't get any spark if the stator doesn't send a/c current to the power pack , capacitor.

The power pack is where the power is stored until triggered by SCR ' s ( switches).

The circuitry in the power pack is then what triggers each cylinder to fire at the proper time.

By triggering the SCR for that particular cylinder , discharging the capacitor , to the ignition coil.

If that helps.

KYHunter

 

[blue fin]

Re: how do you properly test a stator

You won't get any spark if the stator doesn't send a/c current to the power pack , capacitor.

The power pack is where the power is stored until triggered by SCR ' s ( switches).

The circuitry in the power pack is then what triggers each cylinder to fire at the proper time.

By triggering the SCR for that particular cylinder , discharging the capacitor , to the ignition coil.

If that helps.

KYHunter

How do i trigger the scr for each cylinder?

 

[R.Johnson]

Re: how do you properly test a stator

When you said stator, I was thinking charging stator. In your case, you have to check sensor's, charge coil, power pak

 

[F_R]

Re: how do you properly test a stator

Exactly what do you mean by power going to stator but nothing returning to power pack? There is no requirement for "power going to stator". The stator generates it's own 300 volts of power which is stored in the capacitor inside the power pack till the sensors tell it when to fire. Then the 300v is discharged thru the proper coil. You can do a continuity test on the stator windings, or if you want to get fancier you need a peak-reading voltmeter.

disconnect the black/yellow wire from the power pack and see if you have spark then. If you do, the problem is in the kill circuitry.

 

[F_R]

Re: how do you properly test a stator

Should have mentioned, the motor has to be cranking a minimum of 200RPM in order to have any spark. If it's cranking slower than that, you need to check your starter and battery.

 

[KYHunter2]

Re: how do you properly test a stator

The power pack triggers the SCR's. No way I know of, to do it any other way.

I don't understand the power to stator statement either.

Once the engine is turning over/ running.

The flywheel magnets, pass the charge coils , ( located on the stator), and send A/c voltage to the power packs.

Confusing, as to where your getting the power to stator , you describe.

KYHunter

 

[Silvertip]

Re: how do you properly test a stator

Visit your local library and check out a service manual, or buy one, for your engine. It describes how the ignition system works. A stator does not recieve power -- it generates it. Some of the windings on the stator charge the battery, others generate the voltage required to operate the ignition system.

 

[blue fin]

Re: how do you properly test a stator

The power pack triggers the SCR's. No way I know of, to do it any other way.

I don't understand the power to stator statement either.

Once the engine is turning over/ running.

The flywheel magnets, pass the charge coils , ( located on the stator), and send A/c voltage to the power packs.

Confusing, as to where your getting the power to stator , you describe.

KYHunter

I dont know if i am getting power to the stator . i'm sorry for the way that i worded my question. let me explain, I am getting power at the power strip .it is a black plactic strip that my rectifier is wired to and also my stator and a couple of other components .when i crank the motor i used a 12 volt lest light then touched the leads that are going to the stator these leads may be a return from the stator im not sure. the light flickers in the pattern of spark. But there are two sets of leads on the stator two wires on each lead. one lead goin to the power strip. The other going to the power pac that is where all of my coils and sensors are wired i am not getting any power at all to my power pac there for my coils and or sensors have no power. I don't know if this makes any sence to you but your help is greatly appreciated thanks in advance.:/

 

[KYHunter2]

Re: how do you properly test a stator

The flickering light is probably the A/C voltage going to rectifier ,then to battery , as D/C.

The flickering is probably in time with the flywheel magnets passing the stator.

There is no return to stator, just output from it.

Theres A/c sent from charge coils to powerpack capacitors.

And A/c from sensor coils to SCR's.

As well as A/c to rectifier to be converted to D/c by the diodes in rectifier, for charging the battery.

You really need a manual.

It sounds like your charge coils , or sensor coils , may be your problem.

Its very difficult to guess at it.

You can perform sensor , charge coil and powerpack output tests.

All outlined in the manual.

You'll be able to find the problem.

More then happy, to try to help you.

Just very hard to diagnose your problem, from here.

One other thing, the tests your performing, with the 12 volt test light, are not doing you any good.

Also be very carefull poking around the electrical system without a manual.

Besides the chance for a very bad shock.

You can do alot more harm then good, very easy to damage otherwise good components.

KYHunter

 

[blue fin]

Re: how do you properly test a stator

Thanks alot guys i appreciate your time and input, i will go buy a manual. I will keep you guys posted and let yall know what happens. Thanks Again!!!



untill then keep your line in the water8)