90 HP Optimax Specifications

Lightweight power with no sacrifices. Get it all without spending it all.

No Direct Injected engine has more experience, testing or success under its belt than Mercury OptiMax. It's not surprising that OptiMax repeatedly led every DI 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.


Features and Benefits

  • The innovative OptiMax DI system delivers the ultimate in efficiency, squeezing more miles and performance from every drop of fuel.
  • OptiMax boasts an outstanding power-toweight ratio, contributing to increased speed and better fuel efficiency. It's a great engine for any type of boat.
  • OptiMax is built saltwater tough with more stainless steel and corrosionresistant components.
  • OptiMax is controlled by the innovative Motorola® Propulsion Control Module (PCM) and is loaded with "smart" features that make boating more enjoyable, such as SmartCraft and Engine Guardian.
  • No marine engine company has more knowledge about hydrodynamics and gearcase design. Reliability, pleasing performance, comfortable handling and unbeatable speed make it the top choice in DI engines.
  • OptiMax is the best-selling DI outboard on the market and ranks among the marine world's best values.

 

  

HP/kW 90 / 66.2
Full throttle RPM 5000-5750
Cylinder Configuration I-3
Displacement (L) 1.5
Bore and Stroke (in / mm) 3.63 x 3.00in
92 x 76mm
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 2.33:1
Gear Shift F-N-R
Steering Remote
Big Tiller Compatible
Trim System Power Trim
Exhaust System Through 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 375lbs / 170kg
CARB Star Rating 3