Aircraft Alternator

[Capt Jeff]

I'm down to the final wiring of the new 540.

I installed the gear driven aircraft alt that plugs into the front of the motor.

There is a plug @ the front of the alt that read " L - IG", which I know means "Light & Ignition".

I've seen some just attach an "ON/OFF" switch to the plug & manually turn it on & off.

I've also got the factory plug that has (2) two separate wires.

I'm thinking the best way is to attach the (2) two wires together & run them to the "ACC" tab in the ignition switch.

Any suggestions on what's right & wrong?


CJ

 

[duckluv26]

jeff, i really can't help you because i use the automotive alternator set up for one wire applications. it starts charging once the motor turns up like 1200 rpms. however, do a search in the forum cause this issue has been brought up before. from my recollection there were several experienced a/c guys the gave their input. i believe one person had it converted to the one wire application (once it hit a certain rpm) for like $15 at a local alternator guy there in florida.

 

[Capt Jeff]

Thanks, I tried the search first but couldn't find any applicable posts.

 

[Capt Jeff]

103 looks & no suggestions!!!

Can anyone provide a guess?

 

[Des Moines Boater]

Here's a link that might help. http://www.oldengine.org/unfaq/10si.htm

 

[cowboy]

http://www.sacskyranch.com/zeftronics.htm

http://www.zeftronics.com/

Check these out.
Try the second link, and navagate to toubleshooting / General / 14v.
There is some info there that may help.

Most folks I know just use the one wire bely driven alternators, so I'd hate to try and tell you the wrong thing as far as wiring it up.

I know the one wire alternators have an internal VR. You may have to use an external seperate VR unit for that generator.

IJDK.

 

[Capt Jeff]

Spoke with the tech from B&S Specialty Products & here's some of the options that he gave me:

1) Splice the two tabs together & run an on/off switch @ the alternator.

Advantage: Simple
Disatvantage: If you leave switch on @ anytime, it will drain your batteries


2) Run wire to the battery disconnect lugs on the back of the battery switch.

Advantage: Shorter wire run
Disadvantage: If you leave switch on @ anytime, it will drain your batteries


3) Splice the two tabs together & run it to an ACC tab on the ignition switch.

Advantage: Whether or not batteries are on or off, if the IGN switch is off, alt is off
Disatvantage: longer wire run

Obviously #3 is the best option for a wireless alt system.

Hope this helps other!!!

 

[cowboy]

Sounds like you've got it handled man.

 

[sre]

Is this a motorcracft alt with a external voltage rugulator box?

 

[mwood7800]

on mine I ran the field wire to a hobbs 4lb switch in the oil line and the other side of the hobbs to the battery, alt on when engine running

 

[Capt Jeff]

Is this a motorcracft alt with a external voltage rugulator box?

Nippon Denso Aircraft Alt with internal regulator

 

[Skeeter]

#3 option is how I ran my wiring and I have never had a problem.