FourStroke Jet Outboards 25 - 80 HP

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.


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.

HP/kW 25 / 18.4
Full throttle RPM 5000-5500
Cylinder Configuration I-3
Displacement (CID / CC) 32.1 / 526
Bore and Stroke (in / mm) 2.40 x 2.36in
61 x 60mm
Fuel Induction System 2 valve single overhead cam (SOHC)
Ignition CDI w/electronic spark advance
Fuel System Electronic Fuel Injection (EFI)
Alternator Amp 15 amp / 186 watt
Starting Electric (turn-key)
Gearcase Options Jet
Steering Remote
Trim System Gas assist
Power Trim
Recommended Oil Mercury 4-Stroke Outboard Oil
Shaft Length 15 in (381 mm) for use on 20 in (508 mm) transoms
Dry Weight * Lightest model available 186lbs / 84kg
CARB Star Rating 3

FourStroke Jet Outboards 25 - 40 HP Engine Tests

There are currently no engine tests for this product line.

FourStroke Jet Resources

Buy the Books

You can order all available Mercury literature online or through any authorized Mercury dealer. Please have your outboard or sterndrive serial number before placing the order.

  • Operation, Maintenance and Warranty Manuals
  • Parts Manual
  • Service Manual
Purchase a Manual
Request a Brochure

Request printed brochures by mail or download as an electronic PDF.

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Engine Tests