Rectifiers

by Keith Wall in General Tech Discussion 5 years ago

I have a 912 uls. My battery was not charging properly. I have AC current coming from the engine but only 12 volts coming out of the rectifier. I unplugged the flat plug from the rectifier. No scorching. There was oil on the male and female parts of the plug.
Does the rectifier have oil in it?
I cleaned the plug and receptacle and used detox. Cranked the engine and it was charging.

Should I be concerned with the oil?

7931_1_6A0FE367-6EC4-4ACC-B265-01F8D0BBE153.jpeg (You do not have access to download this file.)

Re: Rectifiers

by Bill Hertzel » 5 years ago

Bill Hertzel

13 1.95k 7.98k

There is No Oil in the Rectifier.

There ARE capacitors in the rectifier that can spew a Corrosive Oily like Electrolyte when they fail, howerver.

- - -

Your Random use of Red and Black wires for BOTH 12v Positive AND Ground connections is confusing and a bad practice.

Use RED for Power and Black for Grounds.

If forced to use Black for Power Cables, use extra-long sleeves of RED heat-shrink at the connections.

Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

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Re: Rectifiers

by Peter Kl. » 5 years ago

Peter Kl.

7 230 376

Keith,

sometimes the cable shoes are just not tight enough to make a reliable connection to the male rectifier connectors. Perhaps you want to check them and gently rework them where necessary to ensure a tight fit.
Also I have come across cases were one of the cable shoes did not click in the plastic housing correctly and, instead of being moved on it’s male connector, was pushed (backwards) slightly out of the plastic housing - again that is no good for a reliable and low resistance connection.

Peter

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Rectifiers

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