Cummins C-Cruise, How do it work?

[Greg]

I have Cummins C-Cruise on the boat but have no idea how to get it to function properly. Maybe its broke? I looked through all the manuals I have, but can't find anything on it.

Engine sync works fine. After I re-connected a cable that got unplugged under the helm that connects both sides.

When I engage the cruise I get a Cruise 1 or Cruise 2 indication on both Cummins engine displays. but when I use the RPM +/- switch, it seems to only affect the port side engine.

Seems like this would be a nice feature, but how do you use it?

 

[Robski97]

Greg,
I have the QSc's . The Engione sync must be enabled for cruise to work. With Cruise engaged simply pressing the + / - should raise or lower both motors rpms . ( unless ur set up is different then mine )

Rob

 

[alnav]

I have been trying to figure out how C-Cruise really works for several months and finally found the following:



Marine Cruise Control

This feature provides the user the ability to set two vessel cruise speeds. The engines are shipped from the factory with default values pre-loaded. The user can set these values depending on their preference, and these setpoints can be modified as required. The feature is activated by turning the Cruise 1/Cruise 2 rocker switch to the desired position. Cruise 1 and Cruise 2 setpoints are retained after a keyswitch OFF cycle.

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There are two options for activating the cruise control feature.

• Option 1
• Put the cruise switch (2) in the desired position, CRUISE 1 or CRUISE 2.
• Move the throttle(s) past the desired cruise speed.

The engine(s) speed will increase to the cruise setting.

• Option 2
• Move the throttle past the cruise setpoint.
• Press the CRUISE 1 or CRUISE 2.

The engine(s) speed will decrease to the cruise setting.
NOTE: When using the engine synchronization feature, the master throttle is the only throttle that must be moved past the cruise point.

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To turn the marine cruise control off, put the cruise switch (2) in the OFF position (rocker switch in the center position).
The engine(s) rpm will slowly ramp to the throttle lever setting.
NOTE: The engine will maintain cruise control even with the switch in the OFF position until the throttle is decreased below the cruise rpm.

When changing between CRUISE 1 and CRUISE 2, the engine will ramp up or down to the new desired cruise setting.

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To change the CRUISE 1 or CRUISE 2 default setting rpm:

1. With the engine running, select the cruise setting that you want by setting cruise control switch (2) to CRUISE 1 or CRUISE 2.
2. Move the throttle, both if twin-engine, to the full throttle position while underway, or at the dock with the gear in neutral. The engine will not exceed the existing cruise setting. For example; if CRUISE 2 is at the factory setting of 1200 rpm, the engine will only reach 1200 rpm at full throttle.
3. Using the RPM ± switch (4), adjust the cruise rpm to the new desired engine speed.

NOTE: The cruise speeds can be set between idle and rated engine speed. This new setting will be saved until the cruise is readjusted.

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