Outboard Lighting Coil for 2 Stroke 40HP E40X (66T85533 / 66T8553300) compatible with Yamaha Compatibility and applications Designed for 2stroke outboard motors Part numbers: 66T85533 and 66T8553300 Compatible with Yamaha engines and components that use the 66T series ignition coil Specifically suitable for 2stroke 40HP E40X configurations Material and durability Made from ABS material Strong and durable construction Corrosionresistant for marine environments Function and performance Increases ignition energy strength for reliable starts Promotes smooth engine operation Design and ignition performance Unique design delivers strong and consistent ignition spark Improved spark helps optimize engine performance Potential for increased power output Potential for improved fuel efficiency Benefits at a glance Easier starting and reliable hot and cold starts Consistent ignition for better throttle response Durable, corrosionresistant construction for marine use Fits compatible 66T family outboards and Yamahastyle 2stroke systems Use scenarios Scenario 1: Replacing a worn or weak lighting coil on a Yamaha 2stroke outboard to restore reliable starting performance Scenario 2: Upgrading the ignition system on a 2stroke 40HP E40X engine to improve starting reliability and overall engine response Scenario 3: Maintaining a fleet of boats or performing routine service on 66Tseries outboards to ensure consistent ignition performance and fuel efficiency Installation notes Requires standard mechanical installation and proper electrical connections Ensure the engine is off and cool before replacement Verify compatibility with your specific 66T/66T8553300 configuration before installation Specifications summary Type: Outboard Lighting Coil Engine type: 2stroke outboard Horsepower reference: 40HP (E40X) Part numbers: 66T85533, 66T8553300 Compatibility: Yamaha ( Yamahastyle 66T ignition coil applications ) Material: ABS Performance claims: stronger ignition energy, easier starting, smoother operation; strong and consistent spark; potential for higher power and better fuel efficiency