Sierra Marine 68365P 2-Inch Fuel Gauge, Empty-Half-Full

The Sierra Marine 68365P is a 2-inch fuel level gauge from Sierra's Arctic Series, and it's about as straightforward as a helm instrument gets. You get a clean white face, a black pointer with an orange tip, and an Empty-Half-Full scale that tells you what you need to know with a quick glance down at the dash. No sub-menus, no pairing, no calibration app. Just a needle that swings with your tank level so you can plan your day on the water around fuel, not guesswork.

This is the short electrical sweep version. The needle travels a shorter arc across the dial, which is what lets the whole gauge live in a compact 2-inch opening. That makes it a good fit for the tight instrument clusters you find on center consoles and smaller runabouts, where dash space is at a premium and every cutout counts. The trade-off is honest. A short sweep is quick to read for Empty, Half, and Full, but it won't resolve fuel level as finely as a larger long-sweep dial. For most boaters keeping an eye on a single tank, that's exactly the level of detail you want.

Run at night and the lighting earns its keep. The 68365P uses both thru-dial and perimeter lighting, so the face glows evenly instead of throwing a hot spot across the numbers. Wire the light lead into your existing panel lighting circuit and the gauge comes up with the rest of your dash. In most setups it plays nicely with a standard 12-volt dimmer, so you can knock the brightness down on a dark run and keep your night vision. On some LED switch panels that dim with PWM, you may notice a little flicker, so it's worth testing the light on your own panel before you button everything up.

Installation is classic marine gauge work. The 68365P mounts in a 2-inch gauge opening and runs on 12-volt DC. It reads the signal from a tank sending unit, which isn't included with the gauge, so you'll pair it with a sender that matches its resistance range. Sierra built this one around the standard US-style sender range that most fiberglass runabouts already use, so on a straight refit it usually drops right in. Aluminum tanks and older boats sometimes use a different resistance, so check what your sender puts out before you order. One tip from the field: get the sender wires the right way around the first time. Reverse them and the gauge reads backwards, full when the tank is empty, so it's worth a quick bench test before final mounting.

Who's this for? Anybody repowering, refitting, or just replacing a tired, foggy old fuel gauge on a runabout, skiff, center console, or pontoon. The white face and white bezel give the dash a clean, modern look, and the orange-tipped pointer is easy to pick out against the numbers. In flat, bright midday sun a white face can wash out a bit, so if you run a lot of open water at noon, a small visor or a little shade over the cluster helps. Under a hardtop or on a console with any overhang, readability is a non-issue.

A quick note on what shows up in the box. This listing is for the gauge itself. The sending unit, any mounting hardware beyond the standard gauge nut and bracket, and the wiring pigtails you need for your specific panel are separate. That keeps the price down and lets you match the right sender to your tank instead of paying for one you can't use. If you're not sure which sender fits, measure your tank depth first, because that number drives the sender you buy.

Sierra has been supplying marine gauges, senders, and engine parts to boat builders and boaters for decades, and their gear is engineered to hold up in salt air, spray, and vibration. This gauge meets or exceeds the kind of part it replaces, so you're getting a proper marine-grade instrument, not a repurposed automotive one. Rig it up, match the sender, and you've got reliable fuel readings for seasons to come.