Gauges & Controls FAQs

How do I hook up a tachometer or other gauge to my outboard motor?

Each Mercury Precision Part gauge contains instructions on how to connect the instrument. Our Service manuals contain similar information and are available for purchase through any authorized Mercury dealer or online.

My trim does not change on my SmartCraft gauge, how can I fix that?

The two most common reasons why a trim may not change:

The engine does not have a digital trim sender. Your local Mercury Marine dealer can add one if your engine did not come with a digital trim sender installed.

The gauge's trim calibration procedure hasn't been performed. If the trim calibration is not performed, the display may not move if the sender is "out of range". Please refer to your SmartCraft owner's manual or contact your local Mercury Marine dealer for more information.

What is the correct tachometer setting for my outboard motor?

 

Models

Positive Pulses per Crank Revolution

Poles

Switch Setting

Models 35 and 40

2

4

4P or 3

S/N Range U.S.A. - 5823918 and Above

Canada - 7169337 and Above

Australia - 8070639 and Above

Belgium - 9298955 and Above

Mercury/Mariner 6 through 25, 35, and 40 (2 cylinder) models

All other Mercury/Mariner Models

6

12

6P or 4

Force 40 and Above with Mercury Ignition

6

12

6P

FourStroke Models

8/9.9 hp

3

6C or 2

6

9.9/15 hp

3

6C or 3

6

25 hp

6

6P or 4

12

40/30

3

6C or 2

6

50 hp

3

6C or 2

6

50/60

3

6C or 2

6

75/90*

3

6C or 2

6

*Use QSI tachometer, other models require engine wiring harness changes.

Is SmartTow compatible with my engine?

SmartTow is an option on any Mercury outboard or sterndrive that is equipped with SmartCraft DTS (Digital Throttle & Shift). This includes ALL Verado outboards (four- and six-cylinder), including the 250 and 300 hp Pro FourStrokes, and is an option on MerCruiser engines from 5.0L, 5.7L and 6.2L through the 8.2 MAG H.O.

I have an engine equipped with Digital Throttle & Shift (DTS). I'd like to troll faster than the limit for my engine - is that possible?

The Cruise Control function on DTS will let you hold an RPM or speed for any speed troll - as fast or as slow as you like.

How do I enter calibration mode on an SC1000 gauge?

Press and hold the "MODE" and "+" key simultaneously until you see CAL 1 (choose screens). Or continue to hold both buttons until you see CAL2 (calibrate fuel tanks and external sensors).

How do I perform a master reset on an SC1000 gauge?

Press and hold the plus (+) and minus (-) buttons simultaneously. You will see a graphic where a bar will come in from the left-hand side of the screen, and second bar will come in from the right-hand side of the screen. Conitune to hold the buttons until the two bars touch.

Can I globally control the brightness on my SC1000 or MercMonitor gauges and the SC100 links I have attached to them?

Yes. In Calibration mode, select "yes" for the "Remote LCD Light" setting.