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Powermaster 12si alternators.. quality control ? THEY DONT FIT

Posted: Sun Sep 06, 2020 3:40 pm
by candymancan
Never used power master alternators but they were the only brand i could find that sold 150+ amp alternatirs for our Jeeps.

Well i just got to installing the alternator lol and what in the hell man. The casing is all backwords. So the upper bolt is on the bottom.. and bottom bolt is on the top.. if i flip the alternator around then the exciter wire plug is facing the engine and i cannot get the two prong plug in lol. On top of this the positive post is now touching the engine bracket down below.

I also spun the alternator by hand to listen to it.. and the bearings are horrible sounding. I csn even feel the casing vibration from this. Imagine the engine turning it.

This is the first time ive bought a made in america part in years now. And i gatta say im extremely dissapointed. This is utter bs. Proudly tested by so and so sticker on it. Yea ok tested by a monkey more likecit. How can this pass with bearing noise and a wobbly fan

Re: Powermaster 12si alternators.. quality control ? THEY DONT FIT

Posted: Sun Sep 06, 2020 3:51 pm
by candymancan
Does anyone know of a 140-150+ amp alternator that will bolt up ?

Im looking and all i can find are powermasters.. and looking at the casing on them. They are all backwords !! Its like i gatta take the front outer casing off and flip it so itll bolt up properly.

well i learned you can "clock" an alternator housing, which i did but the bearings still sound like trash.. Gonn have to return it.. real bummer to buy something made in the usa and have it behave like this.

Re: Powermaster 12si alternators.. quality control ? THEY DONT FIT

Posted: Wed Sep 09, 2020 6:13 am
by tgreese
If the 12SI is like the 10SI, you can clock it to whatever position you want. Trivial issue. Take the halves apart, then put it back together wherever you like. You'll need to hold the brushes back with a toothpick (there is a hole specifically for this), button it up, then pull the toothpick out and you're done.

Re: Powermaster 12si alternators.. quality control ? THEY DONT FIT

Posted: Thu Sep 10, 2020 10:07 am
by carnuck
Sounds like it may have been dropped during shipping.