Sierra Lido Water Temperature Gauge 2-Inch 120-240F
Sierra Lido Water Temperature Gauge 2-Inch 120-240F — Product description
The Sierra Lido Series water temperature gauge is a clean, analog read on what your engine is actually doing. Two-inch face, 120 to 240 degree range, white dial with a polished bezel and thru-dial lighting that comes alive at night. It's a straightforward replacement gauge for inboard and I/O rigs, built to Sierra's OEM-grade standard.
Engine temperature is the one gauge you glance at without thinking, right up until the day it saves you a rebuild. The Sierra Lido Series water temperature gauge gives you that read in a clean, analog format that's easy to scan. It covers 120 to 240 degrees Fahrenheit across a short electrical sweep, so a rising needle tells you something's off well before things get ugly. White face, polished bezel, black pointer with an orange tip. It looks the part on any helm.
This is a 2-inch gauge, which drops into the standard 2-1/16 inch panel opening you'll find on most inboard and inboard-outboard boats. Sierra built the Lido line as a direct-fit replacement for tired or fogged-over original gauges, and it meets or exceeds the OEM part it's swapping in for. So if your old temp gauge has gone dim, stuck, or just doesn't match the rest of the cluster anymore, this is a straightforward way to bring the dash back to life.
Here's the one thing to get right before you order: the sender. An analog gauge like this reads resistance from the temperature sender threaded into your engine, and it's calibrated for a specific ohm range. Sierra's Lido gauges are built around the common American 240 to 33 ohm sender curve. If your engine already runs a matching sender, this gauge drops right in. If you're not sure, check the sender's range before you wire anything up. A mismatched sender is the number one reason a new gauge reads flat or pegs the needle, and it's got nothing to do with the gauge itself.
Wiring is simple. You've got a sender signal terminal, a ground, and a 12-volt feed for the thru-dial and perimeter lighting. That lighting is one of the nicer touches on the Lido. Instead of a single bulb throwing a hot spot, the light comes through the dial face and around the perimeter for an even, low-glare glow that's easy on your eyes on a night run. On some rigs the gauge lighting shares a circuit with the rest of the dash, so if you're chasing flicker, put it on a clean switched 12-volt source and consider a dimmer if you're running a full cluster.
A couple of install notes from experience. The polished bezel is nice to look at but it'll pick up scratches if you pry against it with a screwdriver during the fit, so seat it by hand and use a plastic trim tool if the panel is tight. And on higher-vibration installs, engine buzz can slowly back the pointer and mounting hardware loose over a season. A dab of threadlocker on the mounting screws keeps everything where you set it.
Who's this for? Anyone repowering, restoring, or just cleaning up a dated helm on a runabout, cruiser, or center console with an inboard or I/O setup. It's a workhorse replacement gauge, not a digital multifunction display. If you want NMEA data, engine hours, and alarms on a screen, that's a different animal. But if you want a reliable, good-looking analog temp gauge that matches the classic Lido look and reads true, this one earns its spot on the dash.
One honest note on the short sweep. A 2-inch gauge compresses the scale compared to a big-face gauge, so a small temperature creep can be harder to spot at a glance. That's the tradeoff for a compact gauge that fits a tight cluster. For most boats it's a non-issue. You're watching for the needle to climb out of its normal band, and that's plenty visible here. Over a few seasons an analog sender can drift in the heat, so if the reading starts looking optimistic, recalibrate or replace the sender rather than second-guessing the gauge.
Key Features
- 2-inch face fits the standard 2-1/16 inch panel cutout on most inboard and I/O helms
- Reads 120 to 240 degrees Fahrenheit on a short electrical sweep for an easy at-a-glance check
- Analog movement built around the common 240 to 33 ohm American sender curve
- Thru-dial and perimeter lighting throws an even, low-glare glow for night running
- White face, polished bezel, and black pointer with an orange tip in the classic Lido style
- 12-volt DC lighting feed wires into any switched dash circuit
- Direct-fit replacement that meets or exceeds the original equipment gauge it replaces
- Built to stand up to the marine environment from Sierra's OEM gauge line
Why Buy from NVN Marine
- Authorized Sierra Marine reseller, full manufacturer warranty
- NMEA member and ABYC certified, advice from real boat techs
- Same-day shipping before 3 PM ET on in-stock items
- NY headquarters and Fort Lauderdale flagship retail store
Technical specifications
| Title | Sierra Lido Series 2-Inch Water Temperature Gauge |
|---|---|
| Brand | Sierra Marine |
| Manufacturer Part Number | 65509P |
| UPC | 731957423382 |
| Series | Lido |
| Gauge Type | Water Temperature |
| Diameter | 2 Inch |
| Sweep | Short Electrical Sweep |
| Display | Analog |
| Temperature Range | 120 to 240 Degrees Fahrenheit |
| Face Color | White |
| Bezel | Polished |
| Pointer | Black with Orange Tip |
| Lighting | Thru-Dial and Perimeter |
| Voltage | 12 Volt DC |
| Application | Inboard / Inboard-Outboard (I/O) |
Frequently asked questions
What temperature range does this gauge read?
It reads 120 to 240 degrees Fahrenheit across a short electrical sweep. That covers the normal operating band for marine gas engines and gives you room to see a rising needle before it becomes a problem.
What size hole do I need to mount it?
It's a 2-inch gauge that fits the standard 2-1/16 inch panel opening used on most inboard and I/O helms. If your dash already has a 2-inch cluster, this drops right in.
What sender does it need?
Sierra's Lido gauges are calibrated for the common American 240 to 33 ohm sender curve. If your engine already runs a matching sender, the gauge reads correctly out of the box. Check your sender's ohm range if you're not sure.
Why would a brand-new gauge read flat or peg the needle?
Nine times out of ten it's a sender mismatch, not the gauge. A sender with the wrong ohm range will make the needle sit flat or slam to the top. Confirm the sender matches the 240 to 33 ohm range before you assume the gauge is bad.
Does it light up at night?
Yes. It has thru-dial and perimeter lighting fed by a 12-volt DC source. The light comes through the face and around the edge for an even glow instead of a single hot spot, which is easy on your eyes on a night run.
How do I wire it?
Three connections: the sender signal terminal, a ground, and a switched 12-volt feed for the lighting. If the lighting flickers, move it to a clean switched circuit and add a dimmer if you're running a full gauge cluster.
Will it work on my boat?
It's designed for inboard and inboard-outboard (I/O) applications, which covers most runabouts, cruisers, and center consoles with sterndrive or inboard power. Match it to a compatible sender and it fits right in.
Does the gauge come with a temperature sender?
This is the gauge itself. If you already have a matching 240 to 33 ohm sender on the engine, you're set. If not, you'll want to add a compatible sender to complete the install.
Is the analog reading accurate over the long haul?
It reads true when paired with the right sender. Over several seasons an analog sender can drift in the heat, so if the reading starts looking optimistic, recalibrate or replace the sender rather than the gauge.
Any tips for a clean install?
Seat the polished bezel by hand and use a plastic trim tool so you don't scratch it. On higher-vibration rigs, a dab of threadlocker on the mounting screws keeps the pointer and hardware from backing loose over time.
