1987 Johnson 70-HP Engine Gauges on 15-foot Boat
Posted: Fri Feb 16, 2024 6:50 am
I have a 1985 Johnson 70hp engine. My current wiring harness has a light switch, tachometer, and trim tilt gauge. I’d ideally like to add more gauges but am looking for comments how to do so. I’ve read a number of threads on here discussing this. My questions are as follows:
Q1: Can the existing engine wiring harness support more gauges? It’s OMC controls.
Q2: If I were to add more gauges what is the best way to do it?
Q3: Does daisy chaining off the trim tilt wires work or is it better to do it another way?
Q4: I will be adding a Garmin 54cv UHD2 chartplotter. Will this display have a voltmeter function?
Q5: How do you add a fuel gauge if I’m using a 6 gallon external tank?
Q6: Will the existing engine wiring harness support a water pressure gauge?
Q7: How would I add an hour gauge to my setup?
My 1985 Johnson has been remanufactured with a new power head and I’d like to use the gauge for break in and overall maintenance.
Q1: Can the existing engine wiring harness support more gauges? It’s OMC controls.
Q2: If I were to add more gauges what is the best way to do it?
Q3: Does daisy chaining off the trim tilt wires work or is it better to do it another way?
Q4: I will be adding a Garmin 54cv UHD2 chartplotter. Will this display have a voltmeter function?
Q5: How do you add a fuel gauge if I’m using a 6 gallon external tank?
Q6: Will the existing engine wiring harness support a water pressure gauge?
Q7: How would I add an hour gauge to my setup?
My 1985 Johnson has been remanufactured with a new power head and I’d like to use the gauge for break in and overall maintenance.