Cummins QSL9 & QSC8.3 Marine CM850 with SmartCraft 1.0 Wiring Diagram

This wiring diagram covers the marine versions of the Cummins QSL9 and QSC8.3 with the CM850 control module and the SmartCraft 1.0 control network.

It shows the ECM connector pinouts, SmartCraft network wiring, helm display and gauge wiring, and the sensor and injector circuits. Corroded connectors cause most electrical trouble on boats, and with this diagram you can check the suspect circuit pin by pin.

What the diagrams show

• ECM connector pinouts
• SmartCraft network wiring
• Helm display and gauge wiring
• Sensor and injector wiring

Compatibility

• Models: QSL9 Marine with CM850, QSC8.3 Marine with CM850
• Control module: CM850
• Marine network: SmartCraft 1.0
• Document type: Wiring diagram

Before you buy

We also carry the marine Operation and Maintenance Manual and the owner's manual for these engines.

Your engine's dataplate shows the engine model, the engine serial number (ESN) and the CPL number. Compare those with the models above. If you're not sure, email us the dataplate details and we'll check for you.

File format

PDF download. Nothing is shipped. Opens on a computer, tablet or phone.

We're an independent seller and are not affiliated with or endorsed by Cummins. Brand and model names are used only to identify the engines this manual covers.