{"product_id":"sierra-82302p-3in-marine-tachometer-0-3500-rpm-12v","title":"Sierra Marine 82302P 3-Inch Electric Tachometer, 0-3500 RPM","description":"\u003cp class=\"nvn-hero\"\u003eThe Sierra Marine 82302P is a 3-inch full-sweep electric tachometer that reads 0 to 3500 RPM, sized right for marine diesels and small gas inboards. You get a black face, a white needle, a polished stainless steel bezel, and even perimeter lighting for night runs. It's IP65 rated and ships ready to wire into any 12-volt helm.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Sierra Marine 82302P is a 3-inch full-sweep electric tachometer built to live at the helm and take a beating. It reads engine speed from 0 to 3500 RPM, which puts it right in the range for marine diesels and lower-revving gas inboards. The needle swings across roughly two-thirds of the dial, so you get a big, easy read on RPM at a glance instead of squinting at a cramped little arc.\u003c\/p\u003e\n\u003cp\u003eSierra builds this one heavy-duty. The face is black, the bezel is polished stainless steel, and the pointer is a clean white needle. It's a look that fits most factory dash layouts without shouting for attention. Perimeter lighting rings the dial, so once you wire it into your 12-volt system you get even, glare-free illumination on a night run. The gauge is IP65 rated, which means it shrugs off dust and low-pressure water spray. That's plenty for a console with a windshield or a hardtop. If you run a fully open bow that takes green water over the dash, mount it where it won't catch direct spray.\u003c\/p\u003e\n\u003cp\u003eSierra has been supplying engine and boat builders for decades, and their gauges are engineered to meet or beat the original part they replace. That matters on the water, where heat, vibration, and salt air kill cheap instruments fast. The stainless bezel won't pit the way a chromed-plastic ring does, and the sealed housing keeps humidity from fogging the lens from the inside.\u003c\/p\u003e\n\u003cp\u003eBecause it's a full-sweep electric tach, it takes its signal off the alternator rather than a magnetic pickup at the flywheel. That's the standard setup on most inboard diesels and a lot of small gas inboards. The 82302P ships with a 3-foot heavy-duty nylon wiring harness to get you started, and it runs on 12 volts DC. Most installs are straightforward: 12V power, a ground, the sender signal, and a lighting lead.\u003c\/p\u003e\n\u003cp\u003eOne thing to know up front. This is a clean, no-frills RPM gauge. It does not have peak memory, and it doesn't have a built-in over-rev warning light. If you want a record of your highest RPM or an audible alarm, you'll run a separate device for that. For a lot of boaters that's fine. You watch the tach, you know your engine, and you don't need another blinking light on the dash. But if you're chasing max-RPM data on a repower, plan for it.\u003c\/p\u003e\n\u003cp\u003eFitment is simple. It's a standard 3-inch gauge, so it drops into the common 3-3\/8 inch dash cutout that most helms are already machined for. If you're replacing an old tach of the same size, odds are good it goes right back in the same hole. Match it with other Sierra gauges and you keep a consistent look across the whole dash.\u003c\/p\u003e\n\u003cp\u003eA couple of install tips from the dock. Electric tachs are sensitive to grounding. If the needle swings slow or wanders, chase your grounds and tie them together cleanly at the panel instead of scattering them around the boat. A shared, solid ground stops most lazy-needle complaints before they start. And on older boats with long wire runs, voltage drop can dim the perimeter lighting, so run adequate-gauge wire back to a clean 12-volt source.\u003c\/p\u003e\n\u003cp\u003eWho's this for? Owners running a diesel or small gas inboard who want a durable, good-looking RPM gauge that just works. Repower projects. Dash refreshes where the old tach finally gave up. It's not the pick for a high-revving outboard that spins past 3500 RPM, and it's not for someone who needs data logging. For everyone else rigging a straightforward helm, it's an honest, well-built gauge from a name that's supplied marine parts for a very long 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 dial reads 0 to 3500 RPM, ideal for marine diesels and small gas inboards\u003c\/li\u003e\n  \u003cli\u003eFull-sweep electric movement takes its signal from the alternator, no magnetic flywheel pickup required\u003c\/li\u003e\n  \u003cli\u003eBlack face with a white pointer needle for a clean, high-contrast read at the helm\u003c\/li\u003e\n  \u003cli\u003ePolished stainless steel bezel resists pitting and corrosion in salt air\u003c\/li\u003e\n  \u003cli\u003ePerimeter lighting gives even, glare-free illumination on 12-volt night runs\u003c\/li\u003e\n  \u003cli\u003eIP65 rated against dust and low-pressure water spray for protected helms\u003c\/li\u003e\n  \u003cli\u003eRuns on 12 volts DC and ships with a 3-foot heavy-duty nylon wiring harness\u003c\/li\u003e\n  \u003cli\u003eStandard 3-inch gauge fits the common 3-3\/8 inch dash cutout on most helms\u003c\/li\u003e\n  \u003cli\u003eHeavy-duty build engineered to meet or exceed the original equipment gauge\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 the Sierra 82302P tachometer made for?\u003c\/summary\u003e\n    \u003cp\u003eIt reads 0 to 3500 RPM, so it's aimed at marine diesels and lower-revving gas inboards. High-revving outboards will climb past 3500 RPM, so this isn't the gauge for them.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow does an electric tachometer get its signal?\u003c\/summary\u003e\n    \u003cp\u003eThis is a full-sweep electric tach, so it reads engine speed off the alternator rather than a magnetic pickup at the flywheel. That's the common setup on inboard diesels and small gas inboards.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it have peak memory or an over-rev warning light?\u003c\/summary\u003e\n    \u003cp\u003eNo. It's a straightforward RPM gauge without peak memory or a warning indicator. If you need to log max RPM or want an audible alarm, you'll add a separate device for that.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat dash cutout does it need?\u003c\/summary\u003e\n    \u003cp\u003eIt's a standard 3-inch gauge that fits the common 3-3\/8 inch dash hole most helms are already machined for. Replacing a same-size tach usually means it goes right back in the existing hole.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs it waterproof?\u003c\/summary\u003e\n    \u003cp\u003eIt's IP65 rated, so it's sealed against dust and low-pressure water spray. That's fine for a console with a windshield or hardtop. On a fully open helm that takes direct spray, mount it where it's shielded.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat voltage does it run on?\u003c\/summary\u003e\n    \u003cp\u003e12 volts DC, matching most boat electrical systems.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it come with wiring?\u003c\/summary\u003e\n    \u003cp\u003eYes. It ships with a 3-foot heavy-duty nylon wiring harness to get the install started.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat lighting does it have?\u003c\/summary\u003e\n    \u003cp\u003ePerimeter lighting rings the dial for even, glare-free illumination at night once it's wired to a switched 12-volt lighting lead.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eMy electric tach needle swings slowly. What's wrong?\u003c\/summary\u003e\n    \u003cp\u003eThat's almost always a grounding issue. Tie your gauge grounds together cleanly at the panel instead of scattering them around the boat, and the needle usually settles down.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat does the face and bezel look like?\u003c\/summary\u003e\n    \u003cp\u003eBlack face, white pointer needle, and a polished stainless steel bezel. It's a clean look that blends with most factory dash layouts and pairs with matching Sierra gauges.\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 82302P 3-Inch Full-Sweep Electric Marine Tachometer, 0 to 3500 RPM\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\u003e82302P\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e731957349804\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\u003eRPM Range\u003c\/th\u003e\n\u003ctd\u003e0 to 3500 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMovement Type\u003c\/th\u003e\n\u003ctd\u003eFull Sweep Electric\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDisplay Type\u003c\/th\u003e\n\u003ctd\u003eAnalog\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSender Type\u003c\/th\u003e\n\u003ctd\u003eElectric (alternator signal)\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\u003eIncluded Wiring\u003c\/th\u003e\n\u003ctd\u003e3 ft heavy-duty nylon harness\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eMarine (diesel \/ small gas inboard)\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 the Sierra 82302P tachometer made for?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It reads 0 to 3500 RPM, so it's aimed at marine diesels and lower-revving gas inboards. High-revving outboards will climb past 3500 RPM, so this isn't the gauge for them.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How does an electric tachometer get its signal?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"This is a full-sweep electric tach, so it reads engine speed off the alternator rather than a magnetic pickup at the flywheel. That's the common setup on inboard diesels and small gas inboards.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it have peak memory or an over-rev warning light?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. It's a straightforward RPM gauge without peak memory or a warning indicator. If you need to log max RPM or want an audible alarm, you'll add a separate device for that.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What dash cutout does it need?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a standard 3-inch gauge that fits the common 3-3\/8 inch dash hole most helms are already machined for. Replacing a same-size tach usually means it goes right back in the existing hole.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is it waterproof?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's IP65 rated, so it's sealed against dust and low-pressure water spray. That's fine for a console with a windshield or hardtop. 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It ships with a 3-foot heavy-duty nylon wiring harness to get the install started.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What lighting does it have?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Perimeter lighting rings the dial for even, glare-free illumination at night once it's wired to a switched 12-volt lighting lead.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"My electric tach needle swings slowly. What's wrong?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"That's almost always a grounding issue. Tie your gauge grounds together cleanly at the panel instead of scattering them around the boat, and the needle usually settles down.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What does the face and bezel look like?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Black face, white pointer needle, and a polished stainless steel bezel. It's a clean look that blends with most factory dash layouts and pairs with matching Sierra gauges.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Sierra Marine","offers":[{"title":"Default Title","offer_id":45060536762461,"sku":"2008499","price":108.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_41fd2240-a401-4e3a-ab7a-4b48c019598a.jpg?v=1789529373","url":"https:\/\/nvnmarine.com\/products\/sierra-82302p-3in-marine-tachometer-0-3500-rpm-12v","provider":"NVN Marine","version":"1.0","type":"link"}