Need help with an alternator

[Htmlkid]

My alternator just went bad on my 1988 Money M20J 205SE that has a lycoming io 390 engine. The alternator was a prestolite 24V. Unfortunatly they dont make aircraft alternators any more. Does anyone know of a sutable replacement?

[Rwsavory]

You can look for overhauled units on Aircraft Spruce. But, have you explored having yours repaired?

[Ragsf15e]

And did you (or your ia) make sure it’s definitely the alternator and not a bad field wire, voltage reg, or other wiring issue?

[Htmlkid]

6 minutes ago, Rwsavory said:

You can look for overhauled units on Aircraft Spruce. But, have you explored having yours repaired?

Yes its kaput

[LANCECASPER]

3 hours ago, Htmlkid said:

Yes its kaput

Call Aero Accessories in Van Nuys CA and ask Robert if they will overhaul it. 

http://aeroacc-vny.com

[EricJ]

I'd try a local electrical/alternator shop first.    Lots of heavy equipment uses 24V systems, they're not uncommon.

 

[CCAS]

You might try the overhaul path. Aircraft Electrical Components, Inc in Riverside, CA (recently re-located from Irvine) helped me with an alternator overhaul and magneto overhaul in the past year.  Ask for Cindy. 
 

aecnrc.com

(530) 221-4397

 

[1980Mooney]

On 12/10/2024 at 1:54 PM, Htmlkid said:

My alternator just went bad on my 1988 Money M20J 205SE that has a lycoming io 390 engine. The alternator was a prestolite 24V. Unfortunatly they dont make aircraft alternators any more. Does anyone know of a sutable replacement?

It sounds like you retained the alternator that originally came with you IO-360 when you converted to the IO-390.  Sometime back in the late 80's or early 90's, the Prestolite aviation business was first sold to Electrosystems, Inc in Ft Deposit, AL.  Then Kelly Aero acquired Electrosystems.  In 2010, Hartzell acquired the part of Kelly that made alternators and starters (they acquired the rest of Kelly Aero in 2023).

So Prestolite Alternators are still made - just the name has changed to be part of the evil Hartzell empire of Arcline Investment.

Mooney originally used the Prestolite ALU-6421-LS on your J because it was a cheaper alternative to the Lycoming made alternator LW-14357.

The Hartzell ALU-8521LS superseded the ALU-6421-LS.

Kelly Prestolite update bulletin Microsoft Word - Service Bullet

ALU-8521Ls Hartzell New Alternator | Aircraft Spruce

 

[Htmlkid]

On 12/19/2024 at 10:27 AM, 1980Mooney said:

It sounds like you retained the alternator that originally came with you IO-360 when you converted to the IO-390.  Sometime back in the late 80's or early 90's, the Prestolite aviation business was first sold to Electrosystems, Inc in Ft Deposit, AL.  Then Kelly Aero acquired Electrosystems.  In 2010, Hartzell acquired the part of Kelly that made alternators and starters (they acquired the rest of Kelly Aero in 2023).

So Prestolite Alternators are still made - just the name has changed to be part of the evil Hartzell empire of Arcline Investment.

Mooney originally used the Prestolite ALU-6421-LS on your J because it was a cheaper alternative to the Lycoming made alternator LW-14357.

The Hartzell ALU-8521LS superseded the ALU-6421-LS.

Kelly Prestolite update bulletin Microsoft Word - Service Bullet

ALU-8521Ls Hartzell New Alternator | Aircraft Spruce

 

Thank you ... and I found an overhauled one for a reasonable price.