{"product_id":"sierra-68399p-eclipse-3-inch-marine-tachometer-0-7000-rpm-outboard-alternator-coil-sender-domed-glass-lens","title":"Sierra 68399P Eclipse Tachometer, 3 Inch Dial, 0-7000 RPM, Outboard Alt\/Coil","description":"\u003cp\u003eThe Sierra 68399P is a 3 inch Eclipse series tachometer built for outboard engines, reading from 0 to 7000 RPM with a sender code of O\/B ALT.\/COIL, meaning it is designed to pick up its signal from the outboard's alternator or coil circuit. The Eclipse line uses smart white and blue graphics on a black dial background for high-contrast, easy-to-read visibility at a glance. Its bezel is a very low profile design that follows the curve of the lens, a detail that eliminates water trapping around the gauge face, an important feature for an instrument mounted in an open helm or exposed dash environment. The lens itself is domed glass, which sheds water on contact and resists scratching over years of use in a marine environment, so the dial stays legible and free of the haze or pitting that lower-grade plastic lenses develop. Perimeter lighting is built in for strong nighttime readability without a harsh glare washing out the dial face. The dial itself is dual-scale, printed with both U.S. And metric markings along with ISO symbols where applicable, so it reads correctly regardless of the operator's preferred unit system. This tachometer is sold individually and is also offered as part of Sierra's multi-gauge instrument sets and add-on gauge kits for twin-engine outboard installations, so it can be matched with companion gauges for a consistent Eclipse-series helm layout.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 68399P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Size:\u003c\/strong\u003e 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRPM Range:\u003c\/strong\u003e 0-7000 RPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSender Code:\u003c\/strong\u003e O\/B ALT.\/COIL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Eclipse\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLens Material:\u003c\/strong\u003e Glass, domed, scratch-resistant\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScale:\u003c\/strong\u003e U.S. And metric scales with ISO symbols\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLighting:\u003c\/strong\u003e Perimeter lighting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 4 x 6 x 8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.75 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282266936\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for outboard engines using an alternator or coil pickup for the tachometer signal (Sender Code O\/B ALT.\/COIL). This gauge is also listed as a component of Sierra's Eclipse Twin Engine Add On OB Gauge Kit alongside the 68408P gauge.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003eNo OEM cross-reference numbers are specified for this part.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the RPM range on the Sierra 68399P tachometer?\u003c\/strong\u003e The Sierra 68399P Eclipse tachometer reads from 0 to 7000 RPM on its 3 inch dial.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 68399P work with any outboard engine?\u003c\/strong\u003e The 68399P uses Sender Code O\/B ALT.\/COIL, meaning it is built to read its signal from an outboard engine's alternator or coil circuit rather than a diesel or inboard sender type.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size is the dial on this tachometer?\u003c\/strong\u003e The dial measures 3 inches, matching the compact Eclipse series gauge family from Sierra.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the lens on the 68399P glass or plastic?\u003c\/strong\u003e It is domed glass, chosen because it sheds water and resists scratching better than a flat plastic lens over long-term marine exposure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 68399P have backlighting for night use?\u003c\/strong\u003e Yes, the 68399P Eclipse tachometer has perimeter lighting built into the bezel for readability at night.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Eclipse bezel design do differently from a standard gauge bezel?\u003c\/strong\u003e The Eclipse series bezel on the 68399P is a very low profile design that follows the curve of the lens, which eliminates water trapping around the gauge face.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the tachometer show metric readings as well as U.S. Units?\u003c\/strong\u003e The 68399P dial is printed with both U.S. And metric scales along with ISO symbols where applicable, so it can be read either way.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the shipping dimensions and weight of the 68399P?\u003c\/strong\u003e The Sierra 68399P ships at 4 x 6 x 8 inches and weighs 0.75 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 68399P sold as part of a gauge kit?\u003c\/strong\u003e The 68399P is listed as a component of Sierra's Eclipse Twin Engine Add On OB Gauge Kit, which pairs it with the 68408P gauge, though it is also available on its own.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color scheme does the Eclipse tachometer use?\u003c\/strong\u003e The 68399P has white and blue graphics on a black dial background, part of the Eclipse series look shared across Sierra's Eclipse gauge line.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988453339355,"sku":"SIE-68399P","price":96.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/8104uOx-H5L.jpg?v=1784412946","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-68399p-eclipse-3-inch-marine-tachometer-0-7000-rpm-outboard-alternator-coil-sender-domed-glass-lens","provider":"Good Vibes Marina","version":"1.0","type":"link"}