Jet FourStroke 25 EFI


Mercury Jet Outboards are designed with the power and the weight to cover any shallow-water jet boat application. Our FourStroke jet outboards are electronic fuel injected, with a range from 25 to 40 horsepower. Mercury’s jet-drive outboards are specifically designed to pilot boats in shallow waters where propeller-driven hulls are unable to operate. Because there is no lower unit extending below the hull, the jet drive permits passage over obstacles that would foul a propeller-driven outboard boat


Engine Specs

  • Engine type: Inline 3
  • Displacement Liter/CID : 32.1 / 526
  • Bore & Stroke (in/mm) : 2.40 x 2.36in / 61 x 60mm
  • Fuel Induction System : 2 valves per cylinder, single overhead cam (SOHC)
  • Full Throttle RPM Range : 5000-5500
  • Starting : Electric (turn-key), Manual
  • Alternator Amp : 15 amp / 186 watt
  • Steering : Remote, Tiller
  • Trim System : Gas assist, Power Trim
  • Recommended Oil : Mercury 4-Stroke Oil 10W-30
  • Recommended fuel : 87% octane / up to 10% ethanol
  • CARB Star Rating : 3
  • Dry Weight * Lightest model available : 186lbs / 84kg
  • Gearcase Options : Jet Drive
  • Engine protection operator warning system: Low oil pressure , Over-rev , Overheat , Sensor failure
  • Fuel system: Electronic Fuel Injection (EFI)
  • Color: Phantom Black


  • HP/Kw : 25 / 18.4
  • Ignition : CDI w/electronic spark advance
  • Shaft Length : 15″ / 381 mm


Standard Features

The Big Tiller.

The optional center-mounted Big Tiller offers optimal control. A longer tiller grip incorporates a convenient power trim switch, the shift lever is close at hand, and an optional digital troll control adjusts engine speed as low as 700 rpm in 10-rpm increments.

Jet Advantages.

Water is drawn into the unit through the intake grill by an impeller, driven directly by the engine driveshaft. The water is then forced at high pressure through an outlet nozzle, creating thrust that drives the boat forward. To obtain reverse, a gate lifts into position over the outlet re-directing the pressure stream in the opposite direction.