Identifying the Alternator & Serpentine Belt on the QSB 5.9
Cummins Serpentine Belt for QSB 5.9 Engine CPN 5466980 (ORANGE)
$100.00
** New Number 5466980 Replaces 3975127 **
Shipping Weight | 1 lbs |
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Shipping Dimensions | 8 × 6 × 1 in |
In stock
Description
Which serpentine belt do I need on my Cummins Marine QSB 5.9 engine?
Engines with 19SI alternators use the ORANGE BELT.
![Early QSB - 19SI Alternator](https://www.sbmar.com/wp-content/uploads/2015/10/2Early-QSB-19SI.jpg)
Engines with 21/22SI or 24SI alternators use the BROWN BELT.
![An example of a 21-22SI QSB Alternator](https://www.sbmar.com/wp-content/uploads/2015/10/21-22SI_QSB_Alternator.jpg)
Identifying the Alternator on the QSB 5.9
![An example of a 21-22SI QSB Alternator](https://www.sbmar.com/wp-content/uploads/2015/10/21-22SI_QSB_Alternator.jpg)
![QSB 24SI Alternator](https://www.sbmar.com/wp-content/uploads/2015/10/QSB_24_SI_Alternator.jpg)
![An example of a 160 Amp 24SI Alternator](https://www.sbmar.com/wp-content/uploads/2015/10/QSB-160A-24SI-Alternator.jpg)
![Terminal Identification Pin 1 is Field terminal, pin 2 is a sensing lead](https://www.sbmar.com/wp-content/uploads/2015/10/3WireTerminal.jpg)
![Ground lead location on a QSB 21/22SI Alternator](https://www.sbmar.com/wp-content/uploads/2015/10/QSB-22SI-Alternator-Ground-case-lead.jpg)
![Early QSB - 19SI Alternator](https://www.sbmar.com/wp-content/uploads/2015/10/2Early-QSB-19SI.jpg)
![QSB - 19SI Alternator](https://www.sbmar.com/wp-content/uploads/2015/10/Early-QSB-19SI.jpg)
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