For traditional analogue outboard engine gauges, there is very little that is specific to a particular brand, model year, and horsepower. The usual gauges for an outboard engine are:
- Tachometer
- Trim position
- Engine Temperature
- Battery Voltage
- Cooling Water pressure
- Speedometer
The tachometer is somewhat specific to the engine, but more universal tachometers are available that come with a setting switch to match the gauge calibration to the engine.
The trim position gauge is generally specific to the brand of engine, but most brands use the same sender in all models, years, and horsepower. If you get an Evinrude/Johnson trim gauge, it will work with almost any model and horsepower.
A temperature gauge is specifically calibrated to its temperature sender, but usually they are sold together. The temperature sender may be specific to a particular outboard engine because it will be threaded to fit into a threaded boss on the engine block.
The battery voltage gauge is completely universal. It is just a voltmeter that reads in the 12-Volt range.
The cooling water pressure gauge is usually connected by a hose into some port on the cooling system. The gauge and hose are not engine specific. Sometimes you need to get a particular hose barb fitting to thread into a port on the cooling system.
The speedometer is usually a Pitot tube gauge, and actually makes no connection at all to the engine, unless the engine has provided a speedometer Pitot tube port in the gear case.
Your local Evinrude dealer can assist you in finding gauges for a Johnson engine; the Johnson brand is no longer being marketed by Bombardier Recreational Products, who took over the OMC brands about 20-years ago.
There are also many aftermarket outboard engine gauges available from all marine vendors. Check on-line at Defender.com. Visit:
https://search.defender.com/?expression=Eng040CYou can often find older OEM-branded outboard engine gauges for sale on-line at sites like AMAZON or eBAY.
The size of the gauges is generally universal, and the mounting holes are generally the same across all brands.
A principal manufacturer of marine gauges is FARIA-BEEDE. See their website at
https://fariabeede.com/2-pages/prod_display.php?calledGauge=boxsetGauges are available in a wide variety of gauge face styles and colors. There is really no problem in finding traditional analogue gauges. The great number and variety of gauges available is overwhelming and may make the choice difficult.