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Old 03-08-2013, 02:59 PM
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Kohler Command engine harness diode

Just wondering if anyone has a good source for the engine harness diode on Kohler Engines..
The newer engines with the DSAI ignition seem to eat a lot of these diodes..
Most blow out..(open)...some short and fuse..all you have to do is touch 12 pos to the engine and it will blow...
Heres the #'s off the diode...TC: J8 N5398
I've replaced a bunch of them...usually robbed them from other harnesses..
Kohler sells complete harnesses...not diodes...I already have the harness..I just need the Diode..
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Old 03-08-2013, 04:10 PM
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Quote:
Originally Posted by piston slapper View Post
Just wondering if anyone has a good source for the engine harness diode on Kohler Engines..
The newer engines with the DSAI ignition seem to eat a lot of these diodes..
Most blow out..(open)...some short and fuse..all you have to do is touch 12 pos to the engine and it will blow...
Heres the #'s off the diode...TC: J8 N5398
I've replaced a bunch of them...usually robbed them from other harnesses..
Kohler sells complete harnesses...not diodes...I already have the harness..I just need the Diode..
Slapper check out Mouser Electronics
http://www.mouser.com/_/?Keyword=N5398+diode&FS=True

tech sheet of a j8 diode
http://images.ihscontent.net/vipimag...ODS00869-1.pdf

Last edited by ericg; 03-08-2013 at 04:15 PM.
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Old 03-08-2013, 04:25 PM
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Thanx Eric..
Had one of the guys go by Radio Shak and pickup 2 @ N5400 diodes for $1.98..
A little larger..but the mower is up and running for 99 cents...and I have a spare...
They need the mower monday morning...and they got it..the show must go on...
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Old 03-08-2013, 06:30 PM
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Landrus2 Landrus2 is offline
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Hey slapper look what I fond

http://www.ebay.com/itm/KOHLER-OEM-D...item3f1fa3bc47
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Old 03-09-2013, 07:21 AM
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Quote:
Originally Posted by joesimoes2 View Post
Not quite sure what application that diode kit is for.???
The shipping costs more that the 99 cents I paid for the diode I bought at Radio Shak..
I'm sure I could get them even cheaper if I bought them in bulk...
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Old 03-09-2013, 07:39 AM
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These types of devices are usually supplied by electronics manufacturers and their wholesalers, dealers, and distributors.

I'd be willing to wager, in quantities of 100 or greater...
20 to 30 cents each.
Maybe even less, thou I could also be gravely mistaken lol
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Old 03-09-2013, 08:01 AM
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Quote:
Originally Posted by herler View Post
These types of devices are usually supplied by electronics manufacturers and their wholesalers, dealers, and distributors.

I'd be willing to wager, in quantities of 100 or greater...
20 to 30 cents each.
Maybe even less, thou I could also be gravely mistaken lol
Herler, right on the money. $00.17 cents each in quantities of 100.
http://www.mouser.com/_/?Keyword=N5398+diode&FS=True
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Old 03-09-2013, 10:30 AM
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Quote:
Originally Posted by ericg View Post
Herler, right on the money. $00.17 cents each in quantities of 100.
http://www.mouser.com/_/?Keyword=N5398+diode&FS=True
Thanx agin....Eric...
That means I can buy over 200 of them cheaper than I can buy 1 factory engine harness..
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Old 03-09-2013, 11:37 AM
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Quote:
Originally Posted by piston slapper View Post
The newer engines with the DSAI ignition seem to eat a lot of these diodes..

Slapper...... Some info for you, I've had the same repeat issue with a few machines. The diodes are blowing due to voltage spikes from disengagement of the PTO clutch.

The fix for this issue is adding a diode to the PTO clutch plug connector;

http://www.kohler-engine-parts.opeen...ping-diode-kit

The new part number is 25 755 40-S, After installing this kit I've yet to see these units back with a blown DSAI harness diode.

Fix the issue instead of milking it.....
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Old 03-09-2013, 11:53 AM
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Quote:
Originally Posted by Restrorob View Post
Slapper...... Some info for you, I've had the same repeat issue with a few machines. The diodes are blowing due to voltage spikes from disengagement of the PTO clutch.

The fix for this issue is adding a diode to the PTO clutch plug connector;

http://www.kohler-engine-parts.opeen...ping-diode-kit

The new part number is 25 755 40-S, After installing this kit I've yet to see these units back with a blown DSAI harness diode.

Fix the issue instead of milking it.....
You know....I thought about that....
Only had 1 problem....none of my Dixie Chopper Classics have an electric clutch....
I have been routing the regulater directly to the battery cable...instead of thru the ignition...
That seemed to help....thinking I might have been getting stray voltage from the stator when the magnetic field collapses during engine shutdown...
The latest diode failure was right out of BigFishes manual...U Can't Fix Stupid..
Much less 4 of them...The fuse holder attatched to the starter was ripped out of the engine harness..
The Crew decided to bare that wire...loosen a solenoid mounting nut..and install it directly to the solenoid housing...
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