In addition to step 4 on page 9-25 where it shows the charging coil resistance ohms check:If you do the voltage test at the battery while the engine is running is should be 14 volts at 1000rpm.
If this doesn't check out, you then have to find out whether it's the stator or rectifier. Check the ac magneto charging coil resistance (right at the coupler) with your testor set to ohms. If this test checks out then its the rectifier, if it fails then it's your stator.
If you want to tackle this yourself, I would suggest you download the service manual here and refer to page 9-25. This would be the easiest to understand.
NO... Resistance is measured with the engine off. If you are measuring the AC voltage that the stator is putting out, then the engine needs to be running. An external voltage into a meter in resistance mode (Ohms) has a real good chance of frying the meter. The comment about grounding out one of the stator leads and frying the stator is true only if the engine is running.do i check the resistance with the engine running?
Excellent advice!That said, the resistance of the coils is very low; essentially a milliohm-meter is needed to measure accurately. Most multimeters do not have a range low enough to measure it and the meter reads a dead short, even with a good stator. This is where measuring the AC voltage output comes in, as you can do this with any multimeter set in AC volts mode. You should see about the same AC voltage between any and all combinations of the output leads (the 3 combinations stated previously). That AC voltage should be around 20 volts AC or more
I'm not sure that you have meaningful measurements when the needle is barely moving. When 2 sets of coils measure differently than the third, that is usually a sign that one set is somehow bad, but with the unreliability of the measurement you cannot be sure.thanks for the info, my multimeter doesn't go low enough to measure, but it does make needle move slightly on two pair, but not the third, but if i change the leads around and put neg. on #1 and #2 it reads way different actually puts needle half way to dead short, shouldn't it read the same no matter what lead of the meter i use?
I would do either test with the rectifier unplugged, If the rectifier is faulty it could affect the test. For example, an open diode in the rectifier could conceivably cause a different reading when reversing the leads if the diodes are in the circuit being tested for resistance. If the rectifier is internally shorted, it could drag down the voltage output of the stator.When checking ac voltage I had the rectifier plugged in, no voltage on any pair. Do I need to check voltage with the rectifier unplugged? When I checked resistance the rectifier was plugged in, it shouldn't matter should it?