Replies to This Discussion

Permalink Reply by Steven Ward on July 12, 2019 at 7:26pm

Hi Carl, my alternator on my O-200 is a Motorcraft.  You may have heard of The AeroElectric Connection by Bob knockulls. Its a book that has a lot of info. On page 52, he discusses using inexpensive automotive regulators. I used one on my O-200 but haven't started it yet but its very soon. 

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Permalink Reply by Carl Orton on July 12, 2019 at 9:06pm

Thanks, Steven;

Sounds like we have the same alternator. Motorcraft/Electrosystems.

I have a copy of the AeroElectric Connection somewhere....now the challenge is to find it!

Glad you're making good progress with your engine.  Going to Oshkosh? I've been working on my shopping list....

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Permalink Reply by Carl Orton on July 13, 2019 at 9:04am

Found my copy!

just curious......did you use the year/vehicle he cited in the book?

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Permalink Reply by Steven Ward on July 13, 2019 at 5:16pm

No Oshkosh this go around but I will fly my 750 there hopefully next time. I ordered one from Amazon, Tru-Tech VR166T for about $15. I have bare minimum steam gauges and no glass. The aviation regulators I believe, have over voltage protection and are pretty pricey. They look identical on the outside to me tho. Builders with expensive glass would probably want the aviation brand but I think the cheaper one will be all I need. 

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Permalink Reply by Lonnie Fosgate on December 21, 2019 at 7:45pm

Hi Carl, I've got the B & C 10 amp model on my 0200, saves a bunch of weight for sure. But the guy that installed it didn't hook it up right so it toasted the VR. Waiting for a new one to arrive, I'll put it in. I like the 10 lbs. lighter idea even if it is only 10 amps.

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Permalink Reply by Dennis Mitchell on May 21, 2022 at 11:05am

Hey, wondering if you ever resolved the regulator issue? We have an O-200 with the alternator DOFFxxxxx it puts out 16 volts and using Ford regulator VR4xx (I don’t have the exact p/n with me). We’re using a GRT EFIS and EIS and it’s showing a constant 15+ volts. We’ve increased the warning to 15.4 and it is still a problem.

Maybe I don’t understand but it seems the regulator should take the output of the alternator and “regulate” to the proper value. In this case something around 13.5 volts.

any comments are appreciated 

Dennis M

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Permalink Reply by Carl Orton on May 21, 2022 at 1:23pm

Hi, Dennis;

Well, *techinically* I solved it - went with a Hartzell EX14-50 lightweight alternator.  Although I've started the engine, I never flipped the alt field switch (duh) so unk about what it was putting out.

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