Sierra Eclipse Oil Pressure Gauge 0-80 PSI 2 Inch Marine

The Sierra Eclipse oil pressure gauge is a straightforward 2-inch analog gauge built to keep an eye on one of the most important numbers on your boat. It reads from 0 to 80 PSI, which covers the working range of most marine gas and diesel engines, and it uses a short electrical sweep with a white pointer needle against a black face. No screens, no menus. Just a needle that tells you what your oil pressure is doing right now.

We like this gauge for repowers and refits where an old gauge has fogged up, the needle has gotten lazy, or the previous owner left a hole in the dash that needs filling. The 2-inch diameter drops into a standard marine gauge cutout, so it fits the tight instrument panels you find on small outboards, center consoles, and runabouts where every inch of dash real estate is spoken for. The face is deep enough to read at a glance but shallow enough that you're not fighting the back of the panel for wiring room.

Here's how it reads on the water. The short electrical sweep means the needle travels a shorter arc across the dial than a full-sweep gauge. That keeps the gauge compact, and it's plenty for a quick glance to confirm you've got pressure. If you run a diesel and you watch the low end of the scale closely, know that the resolution below 20 PSI is tighter than on a long-sweep gauge, so read it as a healthy-or-not check rather than a precision instrument for tiny changes.

The black face, black bezel, and white needle give you a high-contrast readout in daylight, and the perimeter lighting takes over once the sun goes down. That perimeter ring lights the dial edge evenly so you're not staring at a dark gauge on a night run. One tip from the docks: the lighting pulls a little current, so if you're running a bank of gauges on a sailboat or a smaller battery, wire them through a dimmer or a dedicated instrument switch. You'll save your night vision and a few amp-hours.

A couple of things this gauge is not. It's the version without the programmable warning indicator, so there's no built-in alarm or set-point buzzer. If you want an audible low-oil-pressure warning, you'll wire in a separate pressure switch alongside the gauge. And it's an analog gauge, not a digital display, so there's no peak memory or hour meter here. It just shows pressure, cleanly and reliably, which is exactly what a lot of boaters want.

To get an accurate reading, the gauge needs to be matched to the right sending unit for its ohm range. The sender threads into the engine block or oil gallery and feeds the gauge the resistance signal it reads out as PSI. A mismatched sender is the number-one cause of a gauge that pins high, sits low, or bounces around, so confirm your sender matches this gauge before you blame the gauge. The sender is not included, so plan to order the matching one separately if you don't already have a good one in place.

Install is simple, but a couple of habits pay off. Marine dashes see humidity and temperature swings, and cheap gauges fog behind the lens. A thin bead of silicone around the lens edge during install helps keep moisture out. And on a planing hull that pounds through chop, vibration can work mounting hardware loose over a season, so a dab of thread locker on the studs keeps everything tight. Do those two things and this little gauge will ride out a lot of hours.

It's part of the Sierra Eclipse gauge series, so if you're filling out a full set of matching gauges at the helm, the face, bezel, and lighting style line up across the range for a clean, consistent dash.