150 HP

The most experience for the greatest value.

No direct injection engine has more experience, testing, or success under its belt than Mercury OptiMax. It’s not surprising that OptiMax repeatedly leads every direct injection category – including power, fuel efficiency, reliability, and versatility. It all adds up to a complete line of power that delivers more, and delivers it better. OptiMax remains the best value on the water and a top choice of boaters.

 

Fuel Effeciency

Ultimate Efficiency

The innovative OptiMax DI system delivers the ultimate in efficiency, squeezing more miles and performance from every drop of fuel. The exclusive deflector-shaped pistons and combustion chambers enhance fuel economy and lower emissions by efficiently directing the fuel/air charge to the spark plug. The OptiMax Air Compressor provides a steady charge of cooled air for maximum combustion efficiency.

 

Reliability

Superior Durability

OptiMax’s durable gearcase features a heavy-duty prop shaft and Mercury-patented dual water pickups on the front end of the torpedo for a constant flow of cooling water. It is specifically designed to give you impeccable handling and incredible top speeds. Dome-Shaped Piston Heads direct the fuel-and-air charge to the spark plug more efficiently, providing outstanding durability along with excellent running quality.

Long-Lasting Stainless

OptiMax is built with more stainless steel and corrosion-resistant components, which translates to saltwater durability, longer intervals between maintenance, and lower cost of ownership. In addition, our lower-pressure direct-injection system also provides superior component durability and longevity.

 

Performance

Powerful And Smooth

The OptiMax Two-Stage Direct Injection System provides a constant supply of atomized fuel and air while the Vapor Separator Tank (VST) ensures a constant supply of liquid fuel for the injection process. The result is unmatched throttle response, instant starting, and smooth performance.

Light And Fast

The V-6 design is slim and lightweight making it a great choice for almost any type of boat. It consistently outperforms other DI engines in holeshot, mid-range acceleration and top-end speed.

Leading Gearcase Technology

No other marine engine company has more knowledge about hydrodynamics and gearcase design than Mercury. We have the right gearcase configuration and technology to match any boating application. Our designs result in less drag – giving you better handling and performance.

A Prop For Every Purpose

No one offers a wider variety of propellers than Mercury Marine. From our four-blade, stainless steel Trophy Plus to the revolutionary Enertia, Mercury makes a prop that will maximize your boating enjoyment. Visit the Mercury Prop Selector to choose the prop that’s right for you.

HP/Kw @ Prop 150 / 110
Full throttle RPM 5250-5750
Cylinder Configuration V-6 (60 degree vee)
Displacement (CID / CC) 153 / 2507
Bore and Stroke (in / mm) 3.50 x 2.65in
89 x 67mm
Ignition PCM Digital Inductive
Fuel System 2-stage Direct Fuel Injection (DFI)
Alternator Amp 60 amp / 756 watt
Cooling System Water-cooled with thermostat & pressure-controlled
Starting Electric (turn-key)
Gearcase Ratio 1.87:1
Gear Shift F-N-R
Steering Big Tiller Compatible
Remote
Trim System Power Trim
Counter Rotation Available
Exhaust System Though prop
Shallow water trim range (degrees) 20
Recommended Oil Mercury OptiMax/DFI Outboard Oil
Recommended Fuel 87 octane/up to 10% ethanol
Remote fuel tank optional Yes
Engine Protection Operator Warning System Low oil level
Overheat
Over-rev
SmartCraft Engine Guardian
Compatible with Smartcraft Digital Technology Yes
Shaft Length 20 in (508 mm)
25 in (635mm)
Dry Weight * Lightest model available 431lbs / 195kg
CARB Star Rating Not for sale in California

Engine Test

Test Date Title Type Engine HP Range Last Updated
05/2006 135 hp OptiMax – Bentley 203 Cruise OptiMax OptiMax 2.5L 11/30/2007
08/2005 135 hp OptiMax – Crestliner 1800 Mirage OptiMax OptiMax 2.5L 12/03/2007
09/2006 135 hp OptiMax – Lund 1750 Tyee OptiMax OptiMax 2.5L 11/30/2007
09/2005 135 hp OptiMax – Lund 1800 Explorer Sport – Laser II OptiMax OptiMax 2.5L 09/13/2010
09/2006 135 hp OptiMax – Lund 1800 Explorer Sport – Tempest Plus OptiMax OptiMax 2.5L 09/13/2010
09/2006 135 hp OptiMax – Lund Mr. Pike 17 – Enertia OptiMax OptiMax 2.5L 09/13/2010
09/2005 135 hp OptiMax – Lund Mr. Pike 17 – Laser II OptiMax OptiMax 2.5L 09/13/2010
04/2008 135 hp OptiMax – Sun Tracker Party Barge 25 Regency Edition OptiMax OptiMax 2.5L 08/13/2008
02/2008 135 hp OptiMax – Sun Tracker Party Barge 26 Regency Edition OptiMax OptiMax 2.5L 09/29/2008
05/2008 150 hp Dual OptiMax – Mako 234 Express OptiMax OptiMax 2.5L 05/08/2008
10/2007 150 hp Dual OptiMax – Pro-Line 26 OptiMax OptiMax 2.5L 10/22/2007
07/2007 150 hp Dual OptiMax – Sea Boss 255 C OptiMax OptiMax 2.5L 11/30/2007
05/2007 150 hp OptiMax OptiMax OptiMax 2.5L 10/19/2007
07/2007 150 hp OptiMax – Ranger 1860 Angler OptiMax OptiMax 2.5L 11/30/2007
11/2011 150 hp OptiMax – Alumacraft Dominator 175 CS OptiMax OptiMax 2.5L 01/03/2012
08/2005 150 hp OptiMax – Angler 20 Bay OptiMax OptiMax 2.5L 09/26/2008
05/2006 150 hp OptiMax – Angler 204 OptiMax OptiMax 2.5L 11/30/2007
02/2007 150 hp OptiMax – Angler 204 FX OptiMax OptiMax 2.5L 10/22/2007
08/2005 150 hp OptiMax – Angler 204 Limited Edition OptiMax OptiMax 2.5L 12/03/2007
07/2008 150 hp OptiMax – Champion 183 Elite OptiMax OptiMax 2.5L 07/10/2008
08/2011 150 hp OptiMax – Crest II Chiller OptiMax OptiMax 2.5L 01/04/2012
06/2009 150 hp OptiMax – Crestliner 1800 Super Hawk OptiMax OptiMax 2.5L 06/30/2009
08/2005 150 hp OptiMax – Crestliner 1850 CMV OptiMax OptiMax 2.5L 12/03/2007
05/2010 150 hp OptiMax – Crestliner 1850 Raptor TE WT OptiMax OptiMax 2.5L 09/13/2010
03/2008 150 hp OptiMax – DuraCraft 2074 Sportfish OptiMax OptiMax 2.5L 05/06/2008
05/2009 150 hp OptiMax – Lowe FS 185 OptiMax OptiMax 2.5L 05/05/2009
09/2005 150 hp OptiMax – Lund 1800 Sport Angler – Laser II OptiMax OptiMax 2.5L 09/13/2010
09/2006 150 hp OptiMax – Lund 1800 Sport Angler – Tempest Plus OptiMax OptiMax 2.5L 09/13/2010
09/2006 150 hp OptiMax – Lund 1850 Tyee OptiMax OptiMax 2.5L 11/30/2007
09/2007 150 hp OptiMax – Pro Craft Pro 186 OptiMax OptiMax 2.5L 10/22/2007
09/2007 150 hp OptiMax – Ranger 1860 Angler VS OptiMax OptiMax 2.5L 10/22/2007
07/2007 150 hp OptiMax – Sea Boss 210 CC OptiMax OptiMax 2.5L 11/30/2007
04/2008 150 hp OptiMax – SeaCraft SC20 Master Angler OptiMax OptiMax 2.5L 02/05/2009
04/2008 150 hp OptiMax – ShearWater Z2000 OptiMax OptiMax 2.5L 04/21/2008
07/2008 150 hp OptiMax – South Bay 722CR TT OptiMax OptiMax 2.5L 07/15/2008
01/2007 150 hp OptiMax – Starcraft Islander 221 BRKT OptiMax OptiMax 2.5L 10/22/2007
07/2007 150 hp OptiMax – Stratos 285XL OptiMax OptiMax 2.5L 11/30/2007
07/2009 150 hp OptiMax – Sun Tracker Party Barge 27 OptiMax OptiMax 2.5L 10/16/2009
09/2007 150 hp OptiMax – Triton 191 LTS OptiMax OptiMax 2.5L 12/04/2007
09/2007 150 hp OptiMax – Triton 22 LTS OptiMax OptiMax 2.5L 12/04/2007
01/2008 150 hp OptiMax – Voyager 22 Extreme Ski Express OptiMax OptiMax 2.5L 01/17/2008
05/2008 150hp OptiMax – Crestliner 1850 Canadian OptiMax OptiMax 2.5L 09/30/2010
05/2008 150hp OptiMax – Crestliner 1850 Fish Hawk OptiMax OptiMax 2.5L 09/30/2010
05/2006 175 hp OptiMax – Bentley 243 Cruise OptiMax OptiMax 2.5L 11/30/2007
03/2007 175 hp OptiMax – Lund 2010 Pro Guide OptiMax OptiMax 2.5L 10/22/2007
09/2006 175 hp OptiMax – Lund 2010 Pro Guide OptiMax OptiMax 2.5L 11/30/2007
10/2007 175 hp OptiMax – Nitro 591 OptiMax OptiMax 2.5L 10/22/2007
05/2008 175hp OptiMax – Crestliner 1850 Raptor TE OptiMax OptiMax 2.5L 09/30/2010