Mercury Marines 4-stroke technology consumes 40% less fuel than 2-stroke models for extraordinary value and savings Engines surpass California Air Resources Board (CARB) 3-Star Rating, making them some of the cleanest running on the market-with 91% less emissions than traditional 2-stroke outboards! The inherent 4-stroke characteristics of ultra-quiet, smoke-free operation, plus smooth idling and running make these engines a natural choice whether youre trolling for fish or out just for fun. Clean running 4-stroke engines from 2.5 to 20hp have a CARB three-star, ultra-low emissions rating. The decompression system and electronic CD ignition design ensure an easy, reliable start. One-stage over-rev protection and low oil pressure warning system provide extra peace of mind. Exclusive multifunction tiller handle on the 8hp and 9.9hp models features shift, steering, throttle, throttle friction, and stop controls for convenient one-hand operation. Available in manual-tilt, gas-assist and power-trim. All models are sold with a propeller. Engine Type: 4-stroke Features: 4-stroke technology-quiet, environmentally friendly, 40% more fuel efficient than comparable 2-stroke engines, smooth running/exceptional idling Exhaust: Thru-hub Start: Manual with decompression system, or Electronic CD Ignition Steering Type: Tiller (2.5-6hp), tiller or remote (8 and higher) For U.S. shipment ONLYThe multifunction tiller handle design provides one-hand operation of shifting, stopping, throttle control, tilting and steeringA standard manual recoil, even on electricstart models, provides added safety in the event of a drained batteryEasy starting and fast idle warm-up are provided by manual choke and primerOnly 7 pounds heavier than a comparable two-stroke, it's one of the lightest fourstrokes in its classGearing: F-N-R, 2.08:1Trim Positions: 5 with auto ratchet + shallow-water driveTank Type: ExternalTank Capacity: 3.2gal. Note:These Mercury outboards have 4-stroke engines and, like virtually all 4-stroke engines, depend on oil in their crankcases for lubrication. To prevent the oil from leaking during transport, the engines are not shipped with oil in their crankcases. You must put the correct amount and grade of oil in