2012 Mercury OptiMax® 1.5L 115 HP - 25 in. Shaft


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OptiMax® 1.5L 115 HP - 25 in. Shaft


Dealer Insights

Don't want to go new? Get this previously enjoyed Mercury 115hp today and be ready for those summer months on the water.
Call our sales team at 204-778-6333 or E-Mail us at Sales@Nickelcitymotors.com


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.

  • HP/Kw @ Prop: 115 / 84.5
  • Full throttle RPM: 5000-5750
  • Cylinder Configuration: 3 (in-line)
  • Displacement (CID / CC): 92.96 / 1526
  • Bore and Stroke (in / mm): 3.63 x 3.00 in. (92 x 76 mm)
  • 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: 2.07:1
  • Gear Shift: F-N-R
  • Steering: Big Tiller Compatible, Remote
  • Trim System: Power Trim
  • 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: 25 in. (635 mm)
  • Dry Weight (Lightest model available): 375 lb. / 170 kg
  • CARB Star Rating: 3
Fuel Efficiency
  • 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.
  • 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.
  • 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 inline 3-cylinder 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.



Engine Type
3 (in-line)
Bore x Stroke
3.63 x 3.00 in. (92 x 76 mm)
92.96 cid (1526 cc)
Electric (turn-key)


Shaft Length
25 in. (635 mm)
375 lb. (170 kg)


Trim Method
Power Trim
Propshaft Horsepower
115 hp (84.5 kW)
Full Throttle Operating Range
5000-5750 rpm
Gear Ratio / Shift
Ratio: 2.07:1; Gear Shift: F-N-R
Fuel Induction
2-stage Direct Fuel Injection (DFI)
60 amp / 756 watt
Water-cooled with thermostat & pressure-controlled
Big Tiller Compatible, Remote