View Full Version : Can you retain Analog Gauges if you replace older Mercury Outboard with New 300R?
Rocco
11-14-2025, 11:22 AM
Can I keep my existing Auto Meter gauges if I switch to a new Mercury 300R Outboard?
Jim Speros
11-14-2025, 01:48 PM
There is an analog gauge harness that connects to junction box. I would suggest you definitely add a screen to take full advantage of what is available.
Here is my wiring layout for twins.
546372
It may be difficult to read but note N says if plugging analog harness into J box a Gender Blender is required.
Rocco
11-26-2025, 10:28 AM
Thank You!
25two.stroke
11-26-2025, 01:53 PM
v10 is not compatible with analogue gauges, v6/v8 is so yes. If nothing else get a sc1000 so you can view codes, hours, maintenance log etc.
LakeFever
11-26-2025, 08:27 PM
You can always add old school sending units to the motor. Super easy and low buck too
Powered by vBulletin® Version 4.2.3 Copyright © 2026 vBulletin Solutions, Inc. All rights reserved.