Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Hi, my name is***** will be assisting you.
Can you tell me more about when the fuse blows? Does it blow as soon as you turn the key on? Only after having run for a while? Only after you have done something specific?
So, if you put a 20 amp fuse it is doesn't blow but the stator smokes.
This tells me that the stator is shorted out or the rectifier in the stator wiring is bad which is causing your problem. Do you have a voltmeter?
On your stator, how many wire(s) are coming from it? What color are the wire(s)?
If you check the wire with the engine off and go from the wire to a ground what kind of reading do you get if any?
When does the stator begin to smoke with the 20 amp fuse in the system? Immediately after turning the key on or just when the engine is running?
That tells me that the rectifier is bad in the wiring which is allowing for battery voltage to be feed back into the stator which is causing the stator to smoke and the fuses to blow when using small amperage fuses. By installing the 20 amp fuse it will just take longer to blow it, but it will eventually blow.
Can you tell me what the stator plugs into? Is it going to a regulator(2" X 2" box) or just back to a single wire?
If no box then it has a diode in the stator wiring just about an 1 1/2" up from the connector on the stator wire.
Is your stator a full circle or half?
It has to have a diode in order to keep the battery voltage from back feeding into the stator and smoking the stator. At this point you stator is no good because you indicated that it only has .03 VDC output with the engine running(it should have between 14 - 15 VDC). You have to install a diode in the stator wire between the solenoid and the stator in order to prevent back feeding of the battery voltage to the stator.
Are you certain that you don't have a diode in your stator wire. It would be cover with a short piece of shrink wrap usually black which can be split open to reveal the diode.
Yes, based on the information that you have provided to me so far. You will most certainly have to replace the stator again. Make certain that the replacement has a diode in the wiring otherwise it will do the same thing.
Thank you it has been a pleasure to assist you.
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That short piece of shrink wrap is covering the diode. Based on what you are telling me the diode has to be bad on this stator. You could try to just replace the diode but once the diode goes bad it normally will cook the stator because it gets so hot from voltage feeding backwards into it.
Then this stator has to be plugged into a voltage regulator/rectifier otherwise it will back feed battery voltage into the stator and damage or smoke it. If allowed to back feed too long it will actually melt the windings of the stator.