Key Specifications

• Model Example: Mercury 6 HP FourStroke (e.g., model 6MH) Mercury 6 HP 4‑Stroke Outboard

• Power: 6 hp (4.4 kW) 

• Engine Type: Single cylinder, 4-stroke

• Displacement: 123 cc (7.5 cu in)

• Full Throttle RPM: 5,000–6,000 rpm 

• Fuel Induction: 2-valve pushrod (overhead valve) 

• Recommended Fuel: 87 octane gasoline, up to 10% ethanol 

• Recommended Oil: Mercury FourStroke Oil 10W-30 

• Ignition: CDI (capacitor discharge) with electronic spark advance 

• Bore x Stroke: 2.32 in × 1.77 in (59 mm × 45 mm) 

• Cooling System: Water-cooled with thermostat 

• Gear Shift: Forward-Neutral-Reverse (F-N-R) 

• Gearcase Ratio: 2.15:1

• Trim Positions: 6 trim angles

• Shallow Water Drive: Yes; shallow water trim range ~16° 

• Exhaust System: Through-prop (i.e., exhaust exits under the prop) 

• Fuel Tank:

  • Integrated: ~1.1 L (0.3 gal)

  • Optional Remote Tank: ~12 L (3.2 gal) 

• Steering: Tiller handle 

• Starting: Manual pull start 

• Dry Weight: ~26 kg (57 lb) for the lightest model 

• Carb Star / Emissions Rating: CARB 3-star, Emissions 3-star (depending on region) 

• Color: Phantom Black (typical) 

• Alternator (optional): 12 V / 50 W (on some models)