{"product_id":"sierra-3-inch-electric-tachometer-0-3500-rpm-82303p","title":"Sierra 3-Inch Electric Tachometer 0-3500 RPM | 82303P","description":"\u003cp class=\"nvn-hero\"\u003eThe Sierra Marine 82303P is a clean 3-inch electric tachometer built for the harsh marine environment. It reads 0 to 3500 RPM with a full sweep needle, so it's a natural fit for small diesels and lower-revving engines. Black face, polished stainless bezel, white pointer, and perimeter lighting you can read at night. IP65 rated, 12 volt DC.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Sierra Marine 82303P is a no-nonsense 3-inch tachometer for boats that run smaller diesels or lower-revving gas engines. It's a full sweep electric analog gauge that reads from 0 to 3500 RPM, and that scale is the whole point. If your engine tops out in that range, a 0 to 3500 dial gives you far better needle resolution than a 0 to 6000 gauge where everything crowds into the bottom third of the face.\u003c\/p\u003e\n\u003cp\u003eWe like this one for repowers and refits where you want the helm to look factory again. The black face, polished stainless steel bezel, and white pointer needle read clean in daylight, and the perimeter lighting keeps it legible after dark. It's a 12 volt DC gauge, and it carries an IP65 rating, so it stands up to spray and washdown on an open console. Sierra builds these to meet or exceed the original equipment part they replace, which is exactly what you want when you're swapping out a cracked or foggy old tach.\u003c\/p\u003e\n\u003cp\u003eA quick word on how it reads your engine. This is an electric tach, so it takes an RPM signal, usually from an alternator AC tap or a dedicated tach sender, not a mechanical cable. On most inboard and diesel setups that signal is clean and the needle sits rock steady. On some gas outboards the raw coil signal can get bouncy up high, so if you're wiring it to an outboard, plan to feed it from the correct source and set the calibration for your engine. Get the signal right and this gauge tracks smoothly through the whole sweep.\u003c\/p\u003e\n\u003cp\u003eInstallation is straightforward for anyone comfortable behind the dash. It drops into a standard 3-inch gauge cutout, so it lines up with the rest of a typical instrument cluster. One thing to check before you tighten it down: the polished bezel sits slightly proud, so if you're dropping it into an older panel with recessed pockets, dry-fit first and add a thin spacer ring if you need the face to sit flush. Nothing unusual, just worth a look.\u003c\/p\u003e\n\u003cp\u003eWiring is the usual four connections. Power, ground, the sender or signal wire, and the light. Here's the one we always pass along: run the perimeter lighting off a switched circuit that dies with the ignition. The backlight draws a small constant current, and if you wire it to always-on power, you can come back after a couple of weeks of sitting and find a flat battery. Switch it with the key and you'll never think about it again. And seal the wire entry properly. A dab of dielectric grease and a length of heat-shrink at the terminals keeps that IP65 rating honest on a boat that lives outside.\u003c\/p\u003e\n\u003cp\u003eThis version comes without peak memory and without a warning indicator, so it's a pure tachometer. It shows you what the engine is turning right now, nothing more. That's fine for most boats. If you like to log your wide-open-throttle numbers, you'll want to note them yourself or run a separate hour meter alongside it. The trade is simplicity and a cleaner face, and plenty of owners prefer exactly that.\u003c\/p\u003e\n\u003cp\u003eWho's it for? Repowers, refits, and replacement on boats with engines that live under 3500 RPM. Small diesels, kicker and auxiliary setups, and sailboat auxiliaries are all natural homes for this gauge. If your engine spins past 3500 at wide open throttle, step up to a higher-range tach so you're not pinning the needle. But for the right engine, the 82303P is a tidy, durable, good-looking gauge that'll read true for years. And if you're not sure which sender or signal source your engine needs, give us a call. We'll help you get it wired right the first time.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e3-inch full sweep electric movement drops into a standard gauge cutout for a clean helm fit\u003c\/li\u003e\n  \u003cli\u003e0 to 3500 RPM scale gives fine needle resolution on small diesels and lower-revving engines\u003c\/li\u003e\n  \u003cli\u003eAnalog display with a white pointer needle for fast, at-a-glance reading\u003c\/li\u003e\n  \u003cli\u003eBlack face with a polished stainless steel bezel to match a factory instrument cluster\u003c\/li\u003e\n  \u003cli\u003ePerimeter lighting keeps the dial legible after dark\u003c\/li\u003e\n  \u003cli\u003e12 volt DC operation wires into standard boat electrical systems\u003c\/li\u003e\n  \u003cli\u003eIP65 rated to handle spray and washdown on an open console\u003c\/li\u003e\n  \u003cli\u003eElectric signal input works from an alternator AC tap or a dedicated tach sender\u003c\/li\u003e\n  \u003cli\u003eNo peak memory or warning indicator for a simple, clean tachometer face\u003c\/li\u003e\n  \u003cli\u003eSierra parts are built to meet or exceed the original equipment they replace\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Sierra Marine reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat engines is a 0 to 3500 RPM tachometer meant for?\u003c\/summary\u003e\n    \u003cp\u003eIt's aimed at engines that live under 3500 RPM, like small diesels, kickers, auxiliary motors, and sailboat auxiliaries. Because the whole scale covers only that range, the needle spreads out and you read RPM more precisely than you would on a wide 0 to 6000 gauge. If your engine spins past 3500 at wide open throttle, choose a higher-range tach instead.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow does this electric tachometer get its RPM signal?\u003c\/summary\u003e\n    \u003cp\u003eIt's an electric tach, not a mechanical cable-driven one. It reads an RPM signal, usually from an alternator AC tap or a dedicated tach sender. Set the calibration for your specific engine so the reading lands true.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill it fit my existing gauge hole?\u003c\/summary\u003e\n    \u003cp\u003eIt drops into a standard 3-inch gauge cutout, so it lines up with a typical instrument cluster. The polished bezel sits slightly proud, so if you're fitting it into an older recessed panel, dry-fit first and add a thin spacer ring if you want the face flush.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow many wires does it need?\u003c\/summary\u003e\n    \u003cp\u003eFour connections: power, ground, the sender or signal wire, and the light.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShould I wire the backlight to switched or constant power?\u003c\/summary\u003e\n    \u003cp\u003eWire the perimeter lighting to a switched circuit that turns off with the ignition. The backlight draws a small constant current, and on always-on power it can slowly flatten your battery over a few weeks of sitting.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs it waterproof enough for an open console?\u003c\/summary\u003e\n    \u003cp\u003eYes, it carries an IP65 rating for spray and washdown. On a boat that lives outside, seal the wire entry with dielectric grease and heat-shrink at the terminals to keep that rating honest.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it have a peak RPM memory or warning indicator?\u003c\/summary\u003e\n    \u003cp\u003eNo. This version is a pure tachometer with no peak memory and no warning indicator. It shows real-time RPM only. If you want to track wide-open-throttle numbers, note them yourself or add a separate hour meter.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat voltage does it run on?\u003c\/summary\u003e\n    \u003cp\u003e12 volt DC.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat do the face and bezel look like?\u003c\/summary\u003e\n    \u003cp\u003eBlack face, polished stainless steel bezel, and a white pointer needle, with perimeter lighting for night visibility. It's a clean look that blends into most factory-style helms.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eSierra Marine 3-Inch Full Sweep Electric Tachometer, 0 to 3500 RPM, 82303P\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSierra Marine\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e82303P\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e731957351364\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eGauge Type\u003c\/th\u003e\n\u003ctd\u003eTachometer\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eGauge Diameter\u003c\/th\u003e\n\u003ctd\u003e3 Inch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMovement\u003c\/th\u003e\n\u003ctd\u003eFull Sweep Electric\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eAnalog\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eRPM Range\u003c\/th\u003e\n\u003ctd\u003e0 to 3500 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePeak Memory \/ Warning Indicator\u003c\/th\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFace Color\u003c\/th\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBezel\u003c\/th\u003e\n\u003ctd\u003ePolished Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePointer Needle\u003c\/th\u003e\n\u003ctd\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eLighting\u003c\/th\u003e\n\u003ctd\u003ePerimeter Lighting\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eVoltage\u003c\/th\u003e\n\u003ctd\u003e12 Volt DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWaterproof Rating\u003c\/th\u003e\n\u003ctd\u003eIP65\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eMarine\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What engines is a 0 to 3500 RPM tachometer meant for?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's aimed at engines that live under 3500 RPM, like small diesels, kickers, auxiliary motors, and sailboat auxiliaries. Because the whole scale covers only that range, the needle spreads out and you read RPM more precisely than you would on a wide 0 to 6000 gauge. If your engine spins past 3500 at wide open throttle, choose a higher-range tach instead.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How does this electric tachometer get its RPM signal?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's an electric tach, not a mechanical cable-driven one. It reads an RPM signal, usually from an alternator AC tap or a dedicated tach sender. Set the calibration for your specific engine so the reading lands true.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will it fit my existing gauge hole?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It drops into a standard 3-inch gauge cutout, so it lines up with a typical instrument cluster. The polished bezel sits slightly proud, so if you're fitting it into an older recessed panel, dry-fit first and add a thin spacer ring if you want the face flush.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How many wires does it need?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Four connections: power, ground, the sender or signal wire, and the light.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Should I wire the backlight to switched or constant power?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Wire the perimeter lighting to a switched circuit that turns off with the ignition. The backlight draws a small constant current, and on always-on power it can slowly flatten your battery over a few weeks of sitting.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is it waterproof enough for an open console?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes, it carries an IP65 rating for spray and washdown. On a boat that lives outside, seal the wire entry with dielectric grease and heat-shrink at the terminals to keep that rating honest.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it have a peak RPM memory or warning indicator?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. This version is a pure tachometer with no peak memory and no warning indicator. It shows real-time RPM only. If you want to track wide-open-throttle numbers, note them yourself or add a separate hour meter.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What voltage does it run on?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"12 volt DC.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What do the face and bezel look like?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Black face, polished stainless steel bezel, and a white pointer needle, with perimeter lighting for night visibility. It's a clean look that blends into most factory-style helms.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Sierra Marine","offers":[{"title":"Default Title","offer_id":45062121259101,"sku":"2008659","price":85.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_d2ef6874-f27e-42d2-93c3-918383fb09b9.jpg?v=1789575284","url":"https:\/\/nvnmarine.com\/products\/sierra-3-inch-electric-tachometer-0-3500-rpm-82303p","provider":"NVN Marine","version":"1.0","type":"link"}