{"product_id":"sierra-18-99315-ignition-pack-for-yamaha-70-hp-3-cylinder-2-stroke-outboard-1984-1991-replaces-oem-6h3-85540-10-00-tia03-12","title":"Sierra Ignition Pack 18-99315 for Yamaha 3 Cyl 70 HP 1984-1991 Outboards, Replaces 6H3-85540-10-00","description":"\u003cp\u003eThe Sierra 18-99315 Ignition Pack is a replacement CDI-style ignition module built for Yamaha 3 cylinder 70 HP two-stroke outboards, Model ET and TLN. The ignition pack controls spark timing and delivery to the engine's cylinders, and a failing or worn unit can cause hard starting, misfiring, loss of power, or a complete no-spark condition. Installing a correctly matched ignition pack restores the factory triggering signal to the coils so the engine fires on schedule across the full RPM range.\u003c\/p\u003e\u003cp\u003eThis unit is designed as a direct fitment replacement for the factory ignition pack used on the specified Yamaha 70 HP 3-cylinder engines, matching the OEM electrical connections and mounting so it can be swapped in without modifying the outboard's wiring harness. It is intended for boaters and marine technicians replacing a failed or intermittent ignition pack as part of an outboard tune-up or ignition troubleshooting repair.\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 18-99315\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396138\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.9 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Yamaha 3 Cylinder 70 HP, Model ET, TLN, 2-Stroke, 1984-1991\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 6H3-85540-10-00, 6H3-85540-11-00, TIA03-12, TIA03-12A\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eYamaha 3 Cylinder 70 HP outboards, Model ET and TLN, 2-Stroke, 1984-1991\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e6H3-85540-10-00\u003c\/li\u003e\n\u003cli\u003e6H3-85540-11-00\u003c\/li\u003e\n\u003cli\u003eTIA03-12\u003c\/li\u003e\n\u003cli\u003eTIA03-12A\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99315 ignition pack fit?\u003c\/strong\u003e It fits Yamaha 3 cylinder 70 HP two-stroke outboards, Model ET and TLN, from 1984-1991.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does this ignition pack replace?\u003c\/strong\u003e The Sierra 18-99315 replaces Yamaha OEM numbers 6H3-85540-10-00, 6H3-85540-11-00, TIA03-12, and TIA03-12A.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99315 ignition pack weigh?\u003c\/strong\u003e It weighs 0.9 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this ignition pack work with a different horsepower Yamaha outboard?\u003c\/strong\u003e No, the Sierra 18-99315 is built specifically for the Yamaha 3 cylinder 70 HP two-stroke, Model ET and TLN; other horsepower or cylinder-count engines require a different ignition pack.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a direct plug-in replacement, or does the wiring need to be modified?\u003c\/strong\u003e The 18-99315 is a direct fitment replacement for the factory unit on the specified Yamaha 70 HP engines and connects using the existing OEM wiring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate the ignition pack needs to be replaced?\u003c\/strong\u003e Hard starting, misfiring, a loss of power at higher RPM, or a complete no-spark condition on the Yamaha 70 HP 3-cylinder engine are common signs the ignition pack, such as the 18-99315, has failed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99315 include mounting hardware?\u003c\/strong\u003e The listing covers the ignition pack unit itself; check your existing hardware and wiring harness when installing the 18-99315 on your Yamaha 70 HP outboard.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I cross-reference this part using my old Yamaha ignition pack's number?\u003c\/strong\u003e Yes, if your old unit is stamped 6H3-85540-10-00, 6H3-85540-11-00, TIA03-12, or TIA03-12A, the Sierra 18-99315 is the correct replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99315 a genuine Yamaha part or an aftermarket unit?\u003c\/strong\u003e The 18-99315 is a Sierra-branded ignition pack manufactured to replace the OEM Yamaha unit rather than a factory Yamaha part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this ignition pack fit both ET and TLN model outboards?\u003c\/strong\u003e Yes, the Sierra 18-99315 is designed for both the ET and TLN models of the Yamaha 3 cylinder 70 HP two-stroke outboard.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988441739483,"sku":"SIE-18-99315","price":304.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-117-6H3-11_lg__68375.1558112800.500.750.jpg?v=1785188636","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-99315-ignition-pack-for-yamaha-70-hp-3-cylinder-2-stroke-outboard-1984-1991-replaces-oem-6h3-85540-10-00-tia03-12","provider":"Good Vibes Marina","version":"1.0","type":"link"}