{"product_id":"sierra-18-99527-inline-neon-spark-tester-single-cylinder-ignition-spark-checker-for-marine-engines-and-pwc","title":"Sierra Neon Spark Tester 18-99527, Inline 1-Cylinder Spark Checker for PWC Engines","description":"\u003cp\u003eThe Sierra Neon Spark Tester (18-99527) is an inline, single-cylinder tool for checking spark on a running engine, built with personal watercraft (PWC) applications in mind. It installs in-line with the spark plug lead so you can visually confirm the ignition system is firing while the engine runs, without pulling the plug or guessing at a weak connection. The tester uses a sealed neon design, which adds a margin of safety by reducing the chance of igniting gas fumes that can collect in a PWC hull, an important consideration given how enclosed the engine compartment is on most personal watercraft. Because it checks spark under actual running conditions rather than a static bench test, it gives a more realistic read on ignition performance, helping narrow down hard-starting, misfire, or no-spark complaints to the ignition side of the engine before moving on to plugs, coils, or the CDI\/ignition module. It is sized for a single cylinder, so multi-cylinder engines are checked one plug lead at a time. This is a diagnostic accessory meant for technicians and owners doing their own ignition troubleshooting on outboard and PWC engines.\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 18-99527\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Neon Spark Tester - 1 Cyl.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Sealed, inline neon spark tester\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Capacity:\u003c\/strong\u003e 1 cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Application:\u003c\/strong\u003e Personal watercraft (PWC) ignition systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse Case:\u003c\/strong\u003e Checking spark on a running engine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 7.83 x 4.45 x 2.32 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.3 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394844\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99527 spark tester do?\u003c\/strong\u003e It installs inline with a spark plug lead so you can visually confirm the ignition system is firing while the engine is running, making it a quick way to check for spark without disconnecting the plug.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this tester safe to use on a personal watercraft?\u003c\/strong\u003e Yes, the 18-99527 has a sealed neon design intended to reduce the chance of igniting gas fumes, which is a particular concern in the enclosed hull of a PWC.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many cylinders can this tester check at once?\u003c\/strong\u003e The 18-99527 is a 1-cylinder tester, so on a multi-cylinder engine you check one plug lead at a time.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use this while the engine is running?\u003c\/strong\u003e Yes, the Sierra 18-99527 is designed to check spark on a running engine, giving a real-time read on ignition performance rather than a static bench check.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the package dimensions of the 18-99527 spark tester?\u003c\/strong\u003e The packaged unit measures 7.83 x 4.45 x 2.32 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the spark tester weigh?\u003c\/strong\u003e The Sierra 18-99527 Neon Spark Tester weighs 0.3 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines is the 18-99527 intended for?\u003c\/strong\u003e It is intended for personal watercraft (PWC) engines, where checking spark safely in a confined hull space matters most.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the tester require any tools to install?\u003c\/strong\u003e It is an inline tester that connects in the spark plug lead circuit; no additional tools are needed to place it in line for a spark check.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy use a sealed neon design instead of an open spark gap tester?\u003c\/strong\u003e The sealed design on the 18-99527 lowers the risk of sparking near open gas fumes, which is safer than an exposed spark gap when working around a PWC engine compartment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is associated with this product?\u003c\/strong\u003e The Sierra Neon Spark Tester, part number 18-99527, carries UPC 808282394844.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988445442267,"sku":"SIE-18-99527","price":41.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-511-9764_lg__29156.1558114584.500.750.jpg?v=1785188896","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-99527-inline-neon-spark-tester-single-cylinder-ignition-spark-checker-for-marine-engines-and-pwc","provider":"Good Vibes Marina","version":"1.0","type":"link"}