Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Stator failure after 6 months, 2,200miles

I can say that there are MANY here that have had very similar charging issues as Greg is having. As many have also said, it's usually the rectifier/regulator that goes south, not the rotor/stator.

There's a quick test that can be done to see if the stator has been shorted or has an open.

Test 1:

The stator has three wires coming out of the case. You'll want to measure the resistance between each pair of those wires. The rule of thumb is to look for a low number, around 0.7 Ohms due the size of wire used for this application. You can really measure anywhere under an Ohm. The main thing you want to see is that you are getting the same number between the three wires. Get a multimeter and set it to the lowest Ohm resistance range it has. Take the three measurements. If they are all the same then your stator windings are in tact and all three coils are in good shape.

Test 2:

Measure from each of those three stator wires to a good frame ground, such as a good clean motor mount bolt, battery negative terminal, or whatever you have that is good and clean and connected to the metal of the motor. Using this test, you should see an “open”. You should see an infinite resistance, no connection, no short from any winding to ground.

If you pass both these tests you can be 99% certain your stator is good.

There is an alternate part Harley number that guys have been purchasing to use on the M3W. I believe that part number is in the alternate parts list published and is under a "sticky" at the top of the forum.

If the dealer has already performed the test above and one of the three wires has a short to ground, than you will probably need the stator replaced, but if NOT, I would definitely try the Harley rectifier/regulator because at some point down the road you WILL be needing one. If you put on the new Harley part, you should be seeing 13v to 14v at the battery when at fast idle. If so, you're good to go!

Good luck with the charging issue. But if as you say, you've found debris and chunks of rubber from the hole in the bottom of the motor to trans adapter housing, by all means, let the dealer take out the motor and replace them while they're fiddling with the stator issue.

Dan

A very useful post Dan...

I will second OZ 4/4 comment, excellent , most helpful, Post.

I slip one in now and again... My dad always said that a blind squirrel will find an acorn once in a while!